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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

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Old 12-04-2006, 01:22 PM   #1
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Hesitation/stalling during acceleration

I have an '89 Toyota pickup with the 22RE (EFI) engine (210,000 miles) that has been hesitating and sometimes stalling out lately. Most of the time it does it at low speeds, usually when accelerating from a stop in 1st gear or when starting to accelerate in 2nd or 3rd and once-in-a-while it does it at higher speeds. It also will sometimes completely sputter and stall out usually after coming to stop after running for a while at higher speeds. The most common one is the 1st/2nd gear hesitation when it seems to be acceleration fine then will momentarily die usually firing again and lurching back to life after a couple seconds.

I replaced the plugs - the old ones were definitely worn but didn't show any signs of bigger problems other than age. It ran better for a few days then slowly started hesitating again. The problem continued to get worse with it also starting to completely stall sometimes out as described above. I just replaced the distributer cap & rotor (also well worn) and fuel filter over the weekend and once again it ran fine for a couple days but has just started doing the hesitation thing again.

Overall, the things I've done so far have definitely improved the engine performance & power but obviously not solved the problem completely. I'm going to try some fuel injector cleaner for the heck of it but I'm doubtful that's the problem. Other than that, my next guess was going to be replacing fuel pump unless someone has experienced this problem and has any other suggestions?

I'm a newbie here (sorry for the long post) and not an expert mechanic by any means so go easy on me. I saw a thread with a similar problem and some folks were mentioning the TPS but I'm not even sure what the TPS is?? Help!
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Old 12-04-2006, 01:33 PM   #2
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Quote:
Originally Posted by osu94buckeye View Post
I have an '89 Toyota pickup with the 22RE (EFI) engine (210,000 miles) that has been hesitating and sometimes stalling out lately. Most of the time it does it at low speeds, usually when accelerating from a stop in 1st gear or when starting to accelerate in 2nd or 3rd and once-in-a-while it does it at higher speeds. It also will sometimes completely sputter and stall out usually after coming to stop after running for a while at higher speeds. The most common one is the 1st/2nd gear hesitation when it seems to be acceleration fine then will momentarily die usually firing again and lurching back to life after a couple seconds.

I replaced the plugs - the old ones were definitely worn but didn't show any signs of bigger problems other than age. It ran better for a few days then slowly started hesitating again. The problem continued to get worse with it also starting to completely stall sometimes out as described above. I just replaced the distributer cap & rotor (also well worn) and fuel filter over the weekend and once again it ran fine for a couple days but has just started doing the hesitation thing again.

Overall, the things I've done so far have definitely improved the engine performance & power but obviously not solved the problem completely. I'm going to try some fuel injector cleaner for the heck of it but I'm doubtful that's the problem. Other than that, my next guess was going to be replacing fuel pump unless someone has experienced this problem and has any other suggestions?

I'm a newbie here (sorry for the long post) and not an expert mechanic by any means so go easy on me. I saw a thread with a similar problem and some folks were mentioning the TPS but I'm not even sure what the TPS is?? Help!
What is your idle rpm, and has it changed since this problem started. If so, it could be your TPS.
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Old 12-04-2006, 01:46 PM   #3
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Thanks for the reply, rdharper.

My truck doesn't have a tach so I'm not sure what its idling at, but it seems to be fine and hasn't changed at all since the problem started. I can leave it idling for a while and it never does it. the only time it does it at idle is right after coming down from higher speeds like the highway and that's pretty rare. Mostly the problem is when starting out in 1st or 2nd.

Most of the time it just completely and instantly cuts out for a couple seconds then will come back to life just as quickly. It really feels like the engine just doesn't get any gas for a second or two. I never get a check engine light or any other idiot lights except on the rare occasion that it completely stalls out. Even when that happens, it usually fires right back up after a minute or two at most.

Thanks again...
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Old 12-04-2006, 01:53 PM   #4
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The TPS could explain your other symptoms, but not if the idling has not dropped to 500rpm or so.

I'd do a search on "hesitation" if you haven't already. I guess the next most probable cause might be fuel, fuel filter, fuel pressure etc.

We'll see what others say.
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Old 12-04-2006, 02:35 PM   #5
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This is the check list for poor acceleration in the FM.
1. clutch
2. vacuum leaks-hose connections pcv, egr stays open
3. air filter
4. malfunction code-check engine light diagnostic codes
5. ignition spark- wires, distributor, coil, igniter
6. timing -5 degrees BTDC at idle (T and E1 short circuit)
7. fuel pressure- fuel pump, fuel filter, presure regulator (fuel pressure at cold start injector 33-38 psi with regulator unhooked, 27-31 psi with vacuum on regulator at idling.
8. check injectors
9. check spark plugs- plug gap 0.8mm, 0.031 in.
10. check EFI- air flow meter, water temp sensor, air temp sensor, throttle position sensor, injection signal(solenoid resistor)

For sometimes stalls- check air flow meter
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Old 12-04-2006, 02:49 PM   #6
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Here's how to check the air flow meter
Click the image to open in full size.
and checking resistance by moving the flap with you hand
Click the image to open in full size.
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Old 12-04-2006, 07:29 PM   #7
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Thanks for the reply 4runnerx3. Its not so much "poor acceleration" as it is that the engine will just cut out occasionally and it usually happens when accelerating. Overall it accelerates just fine especially with the new dist cap, rotor, plugs and fuel filter that I've already replaced. Thanks for the list of other possibilities - I made some notes on them below:

Quote:
Originally Posted by 4runnerx3 View Post
This is the check list for poor acceleration in the FM.
1. clutch
-Clutch seems fine, doesn't slip.
2. vacuum leaks-hose connections pcv, egr stays open
-I was thinking of some of these and will check them out.
3. air filter
-recently replaced
4. malfunction code-check engine light diagnostic codes
-it never gives me the check engine light but maybe I'll have a mechanic check the computer for diagnostics
5. ignition spark- wires, distributor, coil, igniter
-I'm going to do the wires - already did the dist - I'll check the coil & ignitor
6. timing -5 degrees BTDC at idle (T and E1 short circuit)
-it always seems to idle fine but I'm going to check the timing anyway
7. fuel pressure- fuel pump, fuel filter, presure regulator (fuel pressure at cold start injector 33-38 psi with regulator unhooked, 27-31 psi with vacuum on regulator at idling.
-fuel pump was also on my list of suspects...
8. check injectors
-I plan on trying some fuel injector cleaner...
9. check spark plugs- plug gap 0.8mm, 0.031 in.
-just replaced and was careful to check the gaps - hesitated before & after
10. check EFI- air flow meter, water temp sensor, air temp sensor, throttle position sensor, injection signal(solenoid resistor)
-all possiblilities but I'm not too familiar with any of these - have to study up a bit!

For sometimes stalls- check air flow meter
Thanks again for the advice - let me know if any of what I've already done gives you anymore ideas.
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Old 10-10-2009, 01:35 PM   #8
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Quote:
Originally Posted by osu94buckeye View Post
Thanks for the reply 4runnerx3. Its not so much "poor acceleration" as it is that the engine will just cut out occasionally and it usually happens when accelerating. Overall it accelerates just fine especially with the new dist cap, rotor, plugs and fuel filter that I've already replaced. Thanks for the list of other possibilities - I made some notes on them below:



Thanks again for the advice - let me know if any of what I've already done gives you anymore ideas.
Did you ever get this figured out?
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Old 10-14-2009, 10:48 AM   #9
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Did you ever get this figured out?
I'm curious too. I'm having what seems to be a hesitation problem with a newly adjusted TPS, no vacuum leaks, steady idle, almost new sparkplugs, wires, rotor, cap, and vacuum hoses. K&N air filter has been changed recently too.

Thought it might be the clutch so I adjusted the clutch pedal and loosened the pedal stop bolt.

Mine has only been doing it in second gear when having the engine off for a few minutes. After driving it's fine.
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Old 08-31-2011, 12:50 AM   #10
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pluggrd muffler or cat
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Old 08-31-2011, 05:13 AM   #11
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i quit sounds dirty not even once atari pong toyota
I hope since 5 years ago, he's got it figured out. Don't we have a :noob: smilie?
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Old 09-12-2012, 03:08 PM   #12
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hesatation

i solved the problem you guys are having on my truck by changing the catilatic converter...i ended up doing a straight pipe from headers to muffler taking out the o2 sensor too. runs great now 22re motors last forever
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Old 09-12-2012, 03:28 PM   #13
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Is one of your injectors going out?
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Old 09-30-2012, 03:19 PM   #14
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i solved the problem you guys are having on my truck by changing the catilatic converter...i ended up doing a straight pipe from headers to muffler taking out the o2 sensor too. runs great now 22re motors last forever
It will run great, but, your mileage will be ˟˟˟˟. When the FI system gets no O2 sensor, it runs rich just to be safe. it will also likely cause premature cat failure.

You really ought to get it put back in.
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Old 01-20-2014, 08:25 PM   #15
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Hey, sorry to resurrect this thread but I've been searching on the same problem. I've replaced the plugs (NGK nickel), wires (import direct), distributor and rotor (BWD), ignition coil, fuel pump, and two timing chain kits (mechanics somehow caused the first new one to bust while chasing down the vacuum line, not sure how that happened) since the timing was seriously off. Still has a hesitation (well it did before the sprocket broke, not sure about this new timing chain kit yet). If the TPS is the culprit (aside from the clutch, everything else looks good or has been checked by a mechanic) is this an expensive or hard part to replace? I'm not trusting my truck anymore to the shop it's currently in as they wanted to double what they are charging for the labor to replace the new kit (and going through 15 quarts of oil, 10.2 of them being 10w-30 full synthetic castrol and being purchased directly by me) after their installation of the first timing chain kit caused the sprocket to break.
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Old 02-10-2014, 05:52 PM   #16
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Question Hesitation/stalling during acceleration on 1990 Pickup

Hesitation/stalling during acceleration
I've been reading this post and my 1990 V6 Toyota Pickup has some of the same symtoms. It happens when my truck is cold. It starts fine, idles about 1400, I let it warm up for several minutes and then if I press on the foot feed it will hesitate(sometimes), loose about 400 rpms and then recover or it will just loose rpms until it dies. Other times it will drive off ok and then hesitat or die down the road. If it dies it will take a couple tries to get it started again and then it might or might not do it again. Also the other day a friend noticed that when I restarted it after dieing the exaust was dark gray to black when it first started. After it warms up it seems to do ok with the exception that it still has a little hesitation when you first press on the foot feed. It also doesn't get the best milage.

I have had it checked twice at a Toyota shops ( 2n shop visit was a tune up) and they tell me they could not replicate the issue. The plugs are new, the distributer cap and roter are new, new air filter, I get no engine light unless it dies, I've checked the computer via the E1 & Te1 clip and all is ok with no codes, I've checked the AFM door and it moves freely and closes on its own but did not check the resistance on the pin connectors in the wire conector since I didn't know about them until looking at this site. All the air tubes from the filter to the throttle body are in good shape. I disconnected the suction line (and pluged it ) on the egr and drove it down the road to see if the hesitation changed and it didn't seem to make any difference. This seems to be a complicated issue to diagnose. Any ideas

Last edited by ChilkatLake; 02-11-2014 at 09:05 AM. Reason: noticed title was not highlighted
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Old 04-14-2014, 07:28 PM   #17
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Ever figure this out?

Hey CilKatlake, did you ever figure out your prob?

Sounds exactally like what is happening to mine now.

Will run fine (better than fine) most of the time, but last night it shut down while sitting and idling. It fired right back up and I drove it 30mi home with no probs. Today, about 1/2 mile out of my driveway, it got sluggish and died out when accelerating. Took forever to get it started again, when it finally did, it blew out some black smoke. Ran like crap for about 2 miles. It stalled out a few more times, I limped it in to a parking lot and it died as soon as I got it into a space. I let it sit for about 15mins, then it fired back up and ran fine again.

I've taken it on two short rides again since, about 7-10mi each with plenty of stops and starts, and it seems to be running normally again.

I know it's going to do it again. Probs like this don't just go away, so want to figure it out before it leaves me somewhere.

I have an '85 SR5 pickup with the 22re EFI

Rebuilt motor and new clutch, plugs, cap and rotor about 8k mi ago

New 110 amp alt

TPS tests in spec

AFM is clean tests in spec

No CEL codes

No CAT and No EGR here (straight pipe in place of cat, and LCE EGR delete kit)

Thought it was, and felt like, a fuel delivery prob, but I assume the black smoke when it finally started is from the engine flooding while trying to start?

So guess that leaves air or spark.......

Ideas anyone?
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Old 04-14-2014, 07:28 PM
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