Georgia Fiero Club Forum

All Things Fiero => General Fiero Discussion => Topic started by: pgackerman on July 26, 2019, 03:20:05 pm

Title: Hard Starting
Post by: pgackerman on July 26, 2019, 03:20:05 pm

My '88 GT is having a bit of trouble starting.  Until recently, it would start without depressing the gas first.  Then I occasionally needed to depress the gas when starting.  Now, I almost always need to depress the gas pedal.

What's the most likely culprit?  Fuel pump (dang, I just filled up)? Starter? Or something else?

Title: Re: Hard Starting
Post by: Fierofool on July 26, 2019, 03:27:28 pm

One should never depress the gas pedal to start a fuel injected car.  Try priming the injectors a couple of times by turning the ignition on and off. 

Title: Re: Hard Starting
Post by: TopNotch on July 26, 2019, 03:31:52 pm

Sounds like you may  possibly have a leaking cold start injector. The mixture is too rich to start, but depressing the gas pedal lets in more air and dilutes the rich mixture.

Title: Re: Hard Starting
Post by: MikeMac on July 26, 2019, 05:03:50 pm

I was having a similar issue on my car and it turned out to be a bad temperature sensor. It wasn't adding enough fuel on startup. It's the sensor on the pulley end of the engine and if I remember correctly it threads in the intake horizontally.

Title: Re: Hard Starting
Post by: MikeMac on July 26, 2019, 05:07:52 pm

Quote from: TopNotch on July 26, 2019, 03:31:52 pm

Sounds like you may  possibly have a leaking cold start injector. The mixture is too rich to start, but depressing the gas pedal lets in more air and dilutes the rich mixture.

What is the procedure for checking the cold start injector. I think Don removed the one on may car.

Title: Re: Hard Starting
Post by: GTRS Fiero on July 26, 2019, 09:43:24 pm

Plug the cold start port on the fuel rail.  See if anything changes.

The symptoms you describe are classic cold start injector.