'86 22re Purrfect cold start, rough almost bucking warm start
10-29-2015, 06:36 AM
#21
Warm start problem
[QUOTE=YotaPower;51624954]Ive got an '86 4runner sr5 w/ a 22re. It runs LIKE A CHAMP.
Especially when started cold. It cranks right over, starts up, 750-800 rpm. Sounds awesome, feels good, strong, etc. No problems there.
However, once warm, starting it up causes the engine to shudder at idle, revs dive, and it has even cut out a few times. Giving it some gas cleans it up while the engine is reved, but it always drops back down and shudders some more. Once a load is applied (ie, i put it in gear and go) there are no more problems what so ever
just today, i drove it to frys, got what i needed, then came out to leave. It almost didnt start, feeling alot like the rough warm idle described above. Again, any apparent problems were gone once the clutch was dropped and i started to go.
I have tried to do a search both here and other 'yota forums with no solid answers. This thread has lots of ideas, but no definite answer. Ive checked what common problems i can find:
-cleaned the throttle body
-checked/adjusted TPS
-cleared out the IAC (opened it up, too, it was so clean, i would have eaten out of it)
one response to a 'rough warm start' thread was that it ended up being the head gasket. im crossing my fingers that isnt the case. Could the cold start fuel injector be the culprit? if it was stuck in the ON position (always firing even when warm)
Anyone find a solution to this? Im beating my head against this issue... My coolant temp sensor was unplugged and when I plugged it back in it starts fine now either cold or warm.
Especially when started cold. It cranks right over, starts up, 750-800 rpm. Sounds awesome, feels good, strong, etc. No problems there.
However, once warm, starting it up causes the engine to shudder at idle, revs dive, and it has even cut out a few times. Giving it some gas cleans it up while the engine is reved, but it always drops back down and shudders some more. Once a load is applied (ie, i put it in gear and go) there are no more problems what so ever
just today, i drove it to frys, got what i needed, then came out to leave. It almost didnt start, feeling alot like the rough warm idle described above. Again, any apparent problems were gone once the clutch was dropped and i started to go.
I have tried to do a search both here and other 'yota forums with no solid answers. This thread has lots of ideas, but no definite answer. Ive checked what common problems i can find:
-cleaned the throttle body
-checked/adjusted TPS
-cleared out the IAC (opened it up, too, it was so clean, i would have eaten out of it)
one response to a 'rough warm start' thread was that it ended up being the head gasket. im crossing my fingers that isnt the case. Could the cold start fuel injector be the culprit? if it was stuck in the ON position (always firing even when warm)
Anyone find a solution to this? Im beating my head against this issue... My coolant temp sensor was unplugged and when I plugged it back in it starts fine now either cold or warm.
10-29-2015, 06:43 AM
#22
Check coolant temp sensor
[QUOTE=YotaPower;51624954]Ive got an '86 4runner sr5 w/ a 22re. It runs LIKE A CHAMP.
Especially when started cold. It cranks right over, starts up, 750-800 rpm. Sounds awesome, feels good, strong, etc. No problems there.
However, once warm, starting it up causes the engine to shudder at idle, revs dive, and it has even cut out a few times. Giving it some gas cleans it up while the engine is reved, but it always drops back down and shudders some more.
Mine did the same thing.
If the coolant temp sensor is bad or unplugged will cause this.
Especially when started cold. It cranks right over, starts up, 750-800 rpm. Sounds awesome, feels good, strong, etc. No problems there.
However, once warm, starting it up causes the engine to shudder at idle, revs dive, and it has even cut out a few times. Giving it some gas cleans it up while the engine is reved, but it always drops back down and shudders some more.
Mine did the same thing.
If the coolant temp sensor is bad or unplugged will cause this.
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