1g, at idle, try to rev, bogs down then revs up.

[panamarojo]

What would cause my car to do this? While its parked and I try to rev the car, it will bog down, almost sounds like it is going to die and then revs up, no matter how far I push the gas pedal down, even if I barely push the pedal in. It will do this when I drive also, it will bog down and the car will buck around. I noticed after the car warmed up it didnt bog down as bad as colder. I already adjusted the TPS and checked for boost leak. Getting spark, replaced coolant temp sensor. Tried different MAF. I unplugged the TPS and it doesnt do nothing, it revs the same. I pulled the injector wires one at a time really quick to see if it would change while in idle and noticed the injector closest to the timing belt didnt change much when I unplugged it. Also unplugged the vaccum from the FPR to see what would happen and it just took a minute for it to start dying down. I re connected and it kept idling. Any help? And its also having a problem starting up, bout 5 cranks to start up, and still 3 to 5 more after engine warmed up, so at all times this happens. No matter if it was just running.

 

[boostedjay32]

check the gap on your plugs..one may be off.. that was my problem last time...

 

[95talonracer]

Make sure there is NO boost leaks at all or maybe a bad fuel filter.

 

[panamarojo]

Brand new fuel filter, and what is the correct way to do boost leak? take of mas and insert into intake tubing? or over turbo inlet? and where does the engine have to be? TDC?

 

[panamarojo]

And does anyone know what the resistance for NGK wires should be?

 

[panamarojo]

I tested the wires and number one cylinder wire was reading 3,900, could this be my problem?

 

[southrneclipser]

is your altenator and battery good? my altenator went out and when my battery got down to about 7 volts it started to do that. how is the idle? mine would putt.. putt.. putt.. really bad

 

[panamarojo]

Well actually I was being jumped by another car when I tried it again cause the battery was dead. But since I was being jumped it should have been alright?

 

[panamarojo]

Ok so I did a boost leak test, Only one I could find kinda, was the throttle body, the coil that hooks up the the throttle cable, if I move that around I can hear the leak almost seal. Also I hear a leak either in the turbo section or 02 housing. But I cannot feel a leak anywhere around it, I went all the way to 30 PSI and still cant find no air steams, no bubbles. YouTube - Picture 013 Anyone know where a leak could be coming from on the first video? Here is one while I was diving. YouTube - Picture 018 and another one after it was a little more warmed up, it felt that it would go more up in RPMS. YouTube - Picture 020

 

[panamarojo]

And then this video at idle, do you hear that noise that happens every few seconds? what is that? YouTube - Picture 017

 

[n8dsmdriven]

kinda a long reach out there but check your ecu.... could be a leak,

and on a side note whats the year and month of your car and does it match your ecu... i had a car come to me and they had a 93 ecu in a 90 and didnt switch the two wires, (#6 and #14) i believe. check ecmtuning.com and look under knowledge and 1g ecu pin out info.

 

[panamarojo]

ECU has been fixed by Steve so thats ok. Anyone got an answer for the boost leak?

 

[boostedjay32]

use soapy water to find the leaks.... spray it everywhere or where you think you have the leak but cant find it...

 

[frankenstein406]

adjust the biss skrew/check oring? mine did the same things its a lot better almost no up and down rpms

 

[panamarojo]

Biss already adjusted and caulked down. Thats the thing, I already put water all over the turbo and o2 housing, no bubbles, and I cant feel nothing. Any possible way it could be leaking from maybe turbo into o2 housing? Did you watched the first video?

 

[panamarojo]

kinda a long reach out there but check your ecu.... could be a leak,

and on a side note whats the year and month of your car and does it match your ecu... i had a car come to me and they had a 93 ecu in a 90 and didnt switch the two wires, (#6 and #14) i believe. check ecmtuning.com and look under knowledge and 1g ecu pin out info.

Car is registered as a 1991, but the sticker on driver side says oct 1990 and Steve said my ecu is a rare 1990 cali eprom ecu.

 

[steve]

Car is registered as a 1991, but the sticker on driver side says oct 1990 and Steve said my ecu is a rare 1990 cali eprom ecu.

Assuming you mean the sticker on the drivers side door frame then it should be a 1991. Because many of these cars have been hacked up at this point the ECU isn't proof of the model just another data point to consider as you fix stuff.

Production switch in June from 90's to 91's.