Hard start after setting for a few hours.
Thread Starter
1st Gear
Joined: Jan 2020
Posts: 1
Likes: 0
Hard start after setting for a few hours.
Looking to fix a hard start problem that started following a dealership replacing 3 injectors. Since that time the dealership has replaced the fuel pump (due to a fault check valve), which didn't correct the hard start. Next replaced the ECM, still didn't fix the hard start problem. Next replaced the fuel pump relay, didn't fix the hard start problem. I brought the car home (1989 Corvette convertible bone stock 40k miles). I have tested fuel rail pressure, 40 with pump running, then dropped to 38 and continued to fall to zero. Followed GM manual testing procedures, first pinching off supply line, same results as above. Next pinched off the return line, same results as above with the exception that during one attempt pressure went to 60 psi and then fell off eventually to zero. In the process of retesting and doing a better job recording data. Any help would be appreciated.
Instructor
Joined: Feb 2018
Posts: 125
Likes: 25
From: NY
^^^^ What he said!!^^^^ I'd suspect another bad injector(s). Sounds like the dealer is just shooting the parts cannon at your car and not really doing any true diagnostics
to solve your problem. Personally, i would have had them replace ALL the injectors since they were in there anyway. Just like when replacing the timing belt, they
recommend replacing the water pump.. Good luck!
to solve your problem. Personally, i would have had them replace ALL the injectors since they were in there anyway. Just like when replacing the timing belt, they
recommend replacing the water pump.. Good luck!
Last edited by RalfKramden; Jan 9, 2020 at 08:22 AM.
Burning Brakes
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From: Park City, TN
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Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
Looking to fix a hard start problem that started following a dealership replacing 3 injectors. Since that time the dealership has replaced the fuel pump (due to a fault check valve), which didn't correct the hard start. Next replaced the ECM, still didn't fix the hard start problem. Next replaced the fuel pump relay, didn't fix the hard start problem. I brought the car home (1989 Corvette convertible bone stock 40k miles). I have tested fuel rail pressure, 40 with pump running, then dropped to 38 and continued to fall to zero. Followed GM manual testing procedures, first pinching off supply line, same results as above. Next pinched off the return line, same results as above with the exception that during one attempt pressure went to 60 psi and then fell off eventually to zero. In the process of retesting and doing a better job recording data. Any help would be appreciated.
Pro
Joined: Aug 2019
Posts: 596
Likes: 146
From: Minford, Ohio
I am amazed at the number of times I read on here the dealership either failed to fix the problem or created a new problem. Does anyone have any happy stories to tell about
their experiences with a dealership?
their experiences with a dealership?
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
I've had some good experience with dealers and a couple of bad. Doesn't seem to make much of a difference to me. IMO, independent or dealership, they both are have screwed up. I have to watch them till I gain confidence in THE MECHANIC and not the shop.
