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

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Old 05-06-2009, 01:11 PM   #1 (permalink)
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Sudden loss of engine power and running rough

Ok so I was driving around today in my 86 4runner 22re (brand new motor, new spark plugs, wires, cap, rotor, alt, starter, clutch, etc) that has over 1k miles on it since everything has been replaced. When suddenly I lost a significant amount of engine power and the engine started running very rough.

It basically ran and drove like when you get water in your distributor.

This is the first time this has happened.

Not the Afm (checked with spare)

Not water anywhere

Not a head gasket (checked compression)

Runs perfectly smooth when initially started especially when cold then starts running like crap after about 30sec or so.

Idles way too low once it starts running rough

Idles perfect initially

Timing is correct

Does not sound like a vacuum leak especially since it runs perfect initially

Anyone got any ideas? I'm so royally pissed off at this freaking pos that I'm ready to freak out and go postal. I've replaced so much on this 4unner yet it still manages to spawn issues at random. Now I'm back to driving my lowered 93' "project" that some how keeps managing to be my daily driver since sold my car to get this 4runner.......%$*!
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1993 Toyota Pickup 2wd street truck - Sold :(
1986 Toyota 4Runner: Fun in the sun - Sold

I'm on expeditionportal.comb (piratemcgee) if anyone needs anything. No longer on here since I don't have a yota!
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Last edited by waskillywabbit; 05-06-2009 at 08:24 PM. Reason: Title clarity per posted sticky
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Old 05-06-2009, 01:50 PM   #2 (permalink)
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Pulled the engine code which is number 6
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1993 Toyota Pickup 2wd street truck - Sold :(
1986 Toyota 4Runner: Fun in the sun - Sold

I'm on expeditionportal.comb (piratemcgee) if anyone needs anything. No longer on here since I don't have a yota!
Cheers!
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Old 05-06-2009, 02:30 PM   #3 (permalink)
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Check the injector ground wires that get bolted to where the 2 halves of intake mani connect. They are red and go to a crimped ring connector.
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Old 05-06-2009, 03:25 PM   #4 (permalink)
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code 6 for the 86 22re means the ECU did not get the NE signal. possible causes are pick-up coil in distributor, igniter, ECU or wiring. Since the engine does start, I'd rule out the pick-up coil and wiring between that coil and the igniter. That leaves the igniter itself, the ECU or the wiring between the igniter and ECU. So first check the connetors to the igniter (on top / near the coil) for any loose connections, corrosion, etc. and check for continuity between those wires and the ECU plugs. If those are all okay, then that leaves you with the igniter or ECU. Hopefully you know someone with a similar setup to your truck or the local wrecking yard will let you test out parts before you buy.
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Last edited by abecedarian; 05-06-2009 at 03:27 PM.
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Old 05-06-2009, 07:47 PM   #5 (permalink)
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My only issue with it being a ignitor or the distributor is that it runs fine initially...also when an ignitor goes it usually just goes it doesn't just slowly die/semi work...

so distributor is my best guess

SOB I hate replacing constantly
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1993 Toyota Pickup 2wd street truck - Sold :(
1986 Toyota 4Runner: Fun in the sun - Sold

I'm on expeditionportal.comb (piratemcgee) if anyone needs anything. No longer on here since I don't have a yota!
Cheers!
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Old 05-06-2009, 07:48 PM   #6 (permalink)
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where is the engine revolution sensor on these trucks? Is it built into the dist?
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1993 Toyota Pickup 2wd street truck - Sold :(
1986 Toyota 4Runner: Fun in the sun - Sold

I'm on expeditionportal.comb (piratemcgee) if anyone needs anything. No longer on here since I don't have a yota!
Cheers!
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Old 05-06-2009, 08:50 PM   #7 (permalink)
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thanks to whoever changed the title by the way
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1986 Toyota 4Runner: Fun in the sun - Sold

I'm on expeditionportal.comb (piratemcgee) if anyone needs anything. No longer on here since I don't have a yota!
Cheers!
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Old 05-07-2009, 01:43 AM   #8 (permalink)
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already told you it's not likely the distributor since it starts and runs.
the igniter will take the signal from the distributor and start the engine with it so that's not a real point of failure, but after the engine is running, the igniter feeds the signal to the ecu and the ecu feeds back to the igniter and adjusts the timing appropriately.
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Old 05-07-2009, 09:41 AM   #9 (permalink)
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so ignitor huh ok
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1993 Toyota Pickup 2wd street truck - Sold :(
1986 Toyota 4Runner: Fun in the sun - Sold

I'm on expeditionportal.comb (piratemcgee) if anyone needs anything. No longer on here since I don't have a yota!
Cheers!
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Old 10-17-2011, 09:51 PM   #10 (permalink)
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i have a problem like this but it is backwards it starts and runs great idleing, when i go to step on it when it is cold it hesitates and then goes. and other times i could have the truck getting up to speed and it is not running right after it hits a certain point it lets out all the power and you can feel it. i have new plugs, filter distributer, mass air flow sensor, i have no clue what it is and it is really starting to make me mad. the engine is a v6 3.0 sr5 pick up thanks
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Old 10-17-2011, 11:51 PM   #11 (permalink)
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Fuel filter?
Or vacuum leak?
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Old 10-18-2011, 12:05 AM   #12 (permalink)
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Going through the same.

I've got the exact same problem in my 95 3.0 I'm looking at it tomarro and will report my findings if i can figure it out.
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Old 10-18-2011, 04:43 AM   #13 (permalink)
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I had this same issue on my 3.0 come to find out the spark plugs were working themselves loose. Only happened while driving at a higher rpm (highway). changed to some copper gaskets and shes fixed.
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Old 10-18-2011, 03:53 PM   #14 (permalink)
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i changed the fuel filter last week and checkd for a vaccum leak and there was nothing. someone told me it could be the cold start injector or sensor. thanks for the help and keep me informed thanks
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Old 10-18-2011, 05:30 PM   #15 (permalink)
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update

As it turns out a spark plug wire of mine was touching the egr? valve, which got hot, burnt the insulation off my new ngk wires, and was shorting out the wire. Got it put together with a better way of wiring (aka not touching the egr valve) and it smoothed it back out. I hope this helps

*did also fix a vacuum hose that needed fixin, but i don't think that helped much...
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Last edited by Watson7094; 10-18-2011 at 05:32 PM.
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Old 10-19-2011, 05:46 PM   #16 (permalink)
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when i smell the exuast it smells like unburnt gas so maybe an oxygen sensor any help would be greatly apprecitated
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Old 10-19-2011, 05:46 PM
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