osu94buckeye

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!

rdharper

What is your idle rpm, and has it changed since this problem started. If so, it could be your TPS.

osu94buckeye

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...

rdharper

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.

4runnerx3

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

4runnerx3

Here's how to check the air flow meter

and checking resistance by moving the flap with you hand

osu94buckeye

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.

blacksheep

Did you ever get this figured out?

DupermanDave

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.

irontoys1

pluggrd muffler or cat

vasinvictor

iTrader: (3)

I hope since 5 years ago, he's got it figured out. Don't we have a :noob: smilie?

truck guy

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

dunedain_yota_ethan

Is one of your injectors going out?

pete c

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.

janagyjr

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.

ChilkatLake

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

IknowUrider

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?

Speed limit

My Toyota tundra 2007 model is been stalling band jerking most times when im in traffic. Now it doesn't even move at all. Mechanic said it was the plugs then he changed his mind when I told him that I googled it and it saying fuel filter is dirty and will need cleaning. This was after I started noticing a red fuel sign under the fuel gauge corner. Now he has removed the fuel filter and the fuel pump and ask I replaced them.
What is the problem and what should I do next

DJLunatik

Really curious if anyone has yet to get a positive outcome to the same problem I keep seeing posted about the hesitation/stalling problem.

I have a 91 4Runner Rebuilt motor with 1,200 miles on it roughly, Trans Rebuilt at the same time the Motor was Rebuilt, new clutch. Some things I have done to diagnose this and attemp to fix the problem....

New Ngk plugs, New 8mm wires, New cap and rotor (all needed to be R&R) New fuel filter, muffler was beyond gone.. Replaced with glasspak, Always run 97 octane when I fuel up, I ran a stp fuel system treatment through it (2 tanks) also tried running octane booster (Royal Purple)

It never has any problems with idling nor timing, the fuel treatment seemed to help but never resolved the issue, motor is hitting 80 psi oil pressure, I'm still planning on checking my Tps as well as checking the fuel system from the fuel filter back, never have check engine lights or any idiots light up ever.. I will update with any diagnostics ran and any luck I have with this, really hessitating on having to pull the damn fuel tank but If I have to drop it to fix this It's defiantly worth the fix especially with the mods I have done to I and the motor and Trans rebuild that was done before I purchased it...

snpdg

My 1994 4x4 Toyota Truck is having acceleration issues. It happens after I have been driving almost amile.When I press the gas pedal theengine sounds very clogged and the acceleration is very bad.The sound is “duh-duh-duh-duh” instead of asmooth “vroom” acceleration sound.It isbad especially going up a hill.When Iam in neutral and I hit the gas the engine does not seem to have this issue.
Any ideas on what this might be? I am not looking to spend much money, butwanted to get some info before I started talking to mechanics.
Thanks for any input.