BushyTea

I have a 1994 Camaro Z28.

In the past few months there has been an on going problem with my car starting. In the mornings or if its cold outside the car will start up quickly with no issues. However, once I get to where I am going and the car sits for a few hours when I go to start it the motor has to turn over 5-6 times before it fires. Seems like it is a fuel issue but I can not find anything wrong.

I tried to look for leaky injectors and I didn't notice any leaks but when I prime the pump typically one or so of the injectors blow out of the rail. I recently replaced all of the injector O-rings as well to see if that was the problem but it did not fix it. I checked the fuel pressure regulator for fuel in the vacuum line but did not see any or smell any.

Any idea would be appreciated.

Thanks

GRndPNdN93Z

I have the same problem with mine, hope some1 can help us

grabbem88

rent a fuel gauge tester or borrow one tape it to your windshield and document your pressure readings cold..then hot....idle...2000 rpm and wot...if pressure falls below gm specs...i'd be looking into a fuel pump replacement...

Injuneer

If your injectors "blow out of the rail", you aren't using the retainer clips.

When you go to start if after it sits for a couple hours, try putting the accel pedal on the floor and holding it there BEFORE turning the key to start it. If that helps it start faster, it would indicate a problem with leaking injectors.

You also might want to check the coolant temp sensor for accuracy:

http://shbox.com/1/4th_gen_tech2.html#ect

BushyTea

Thanks Injuneer for you help and the information.

However, putting the pedal to the floor before starting does not seem to do any good. Also the sensors both tested good and accurate.

The car started fine before but it seems this problem popped up after I developed an exhaust leak where the y-pipe bolts to the manifold. Once that exhaust leak happened is about when this problem started for me. I have since fixed that issue but the problem is still there. Not sure if that has something to do with the issue I am having or not.

BushyTea

Well, I haven't had a lot of time to address this issue due to my ignition switch failing so I had to fix that.

However, I did pull the line off the FPR (fuel pressure regulator) and it did smell like gas. There was no gas in the line but it had a strong smell of gas. Possibly the FPR is failing?

Thanks!

RamAir95TA

Very possible, assuming you're smelling the line coming from the regulator and not from the manifold.

Guest47904

That line always smells like that. Try putting suction to it and see if it can hold.

Next time you try to start it when it would have a long starting issue try priming the pump several times before finally cranking it over. More than likely you are suffering from a sticky check ball at the fuel pump