94 camry rough idle, stalls, won't start - Toyota Nation Forum : Toyota Car and Truck Forums

waveslayer · 08-18-2008, 11:15 AM

So i just replaced my timing belt and took my car for a 3 mile test run. Seemed to run fine until i turned it off and restarted it. The engine idle speed drop from 750 to 600 and stumbled then continued to drop. Now i can't start it again. Sometimes i can start it after several minutes and it runs fine over 1200 rpm. Great throttle response as long as it doesn't idle.
Things i replaced:
fuel pump
ECU
timing belt

Things i checked:
Coolant Temprature sensor- Seems OK
Throttle Possition Sensor- In Process could be questionable
Intake air controller- Seems OK
Map Censor - Unable to check

Any Other ideas before i go any furthor or start ordering parts?

Maim Menu · 08-18-2008, 03:58 PM

Check your ignition coils. My old camry died on me few years ago and wouldn't run for more than a second. It would simply stumble a bit and die. It was one of the coils. I'm not sure that's your problem cause you seem to be able to run it for a little while, but let's say one of the coils is seriously on it's way out I guess it could do that.

JCamry94 · 08-18-2008, 04:06 PM

Seafoam the brake booster, throttle body, fuel, and oil.

Get some fresh plugs after, and change your oil.

Worked very well for me.

Kep · 08-18-2008, 04:07 PM

It kind of sounds like a plugged up EGR system.

However, after all of the other work there may be something that was installed incorrectly. Just for grins, clear the ECU again (unhook the battery for a couple of minutes). If the same thing happens it may be the ECU (or a sensor mis-informing the ECU but since you just changed the ECU...). Why did you change the ECU? Do you still have the original ECU that you could swap back?

Kep