running bad and check engine light on
Thread Starter
Heel & Toe
Joined: Apr 2017
Posts: 15
Likes: 1
running bad and check engine light on
I bought a 1985 Corvette 2 weeks ago with 7500 miles on it and it ran great. The former owner passed away in 2016 so last weekend I siphoned out gas that was in the tank and replaced with fresh stabilized gas and didn't start the car till today and it did not want to idle and would stall unless I ran it at about 3500 to 4000 rpms, check engine light came on and it will idle once it is warmed up but runs really bad.
Any idea's what I did?
Any idea's what I did?
Drifting
Joined: May 2007
Posts: 1,440
Likes: 19
From: SW Chicago Burbs IL
Thread Starter
Heel & Toe
Joined: Apr 2017
Posts: 15
Likes: 1
Zero fuel pressure
I just tested the fuel pressure, ZERO.
I can't hear the fuel pump either, must have messed up the fuel pump with the siphon hose?
I'm surprised the car runs at all with zero fuel pressure.
Thanks for your suggestions
I can't hear the fuel pump either, must have messed up the fuel pump with the siphon hose?
I'm surprised the car runs at all with zero fuel pressure.
Thanks for your suggestions
Drifting
Joined: May 2007
Posts: 1,440
Likes: 19
From: SW Chicago Burbs IL
Did you remove the fuel pump to siphon it or just put a hose down the fill port? You might have knocked the wiring loose. You can apply 12v to the pump harness located at the tank (remove fuel fill door) to test. You can also apply 12v to terminal g of the ALDL to test.
Team Owner
Joined: Jul 2004
Posts: 28,432
Likes: 3,285
From: Hartford WI
I can't see how it runs with 0 psi. Try again and if it dies use starting fluid.
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Team Owner
Joined: Jul 2004
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From: Hartford WI
Drifting
Joined: May 2007
Posts: 1,440
Likes: 19
From: SW Chicago Burbs IL
What method did you use to test the fuel pressure? If you get zero psi while running, your gauge is faulty or you don't have it screwed on to the schrader valve correctly.
As far as the fuel pump running, when you turn the key on initially, you should hear the pump prime for a few seconds. Just cycling the key back and forth won't make this happen because there is a timer/delay before it will prime again.
Team Owner
Joined: Jul 2004
Posts: 28,432
Likes: 3,285
From: Hartford WI
Thread Starter
Heel & Toe
Joined: Apr 2017
Posts: 15
Likes: 1
Drifting
Joined: May 2007
Posts: 1,440
Likes: 19
From: SW Chicago Burbs IL
Thread Starter
Heel & Toe
Joined: Apr 2017
Posts: 15
Likes: 1
When I push in on the schrader valve nothing comes out with the ignition on, not sure when it's running.
Team Owner
Joined: Jul 2004
Posts: 28,432
Likes: 3,285
From: Hartford WI
It can't have running with no pressure. So you need to do diagnostics first. Or we can throw parts till you get lucky or you run out of money.
Burning Brakes
Joined: Oct 2001
Posts: 911
Likes: 5
From: TN
gasket
You are going to be surprised when you go to the Chev dealership to buy a new gasket for the fuel filler gasket because of the cost for this gasket.
Team Owner
Joined: Jul 2004
Posts: 28,432
Likes: 3,285
From: Hartford WI
http://www.racetronix.biz/itemdesc.asp?ic=PIK-006&eq=&Tp=
30 dollars and all the right parts and replacement hose for the pulsator
Last edited by aklim; Apr 17, 2017 at 06:51 PM.