need help please! - ZR-1 Net Registry Forums

Hog · 06-04-2018

If the tank was empty and you added 2 gallons with Seafoam, you COULD have disturbed all sorts of rust/corrosion into the fuel system.

A quick fuel filter swap with an inspection of the old filters internals can reveal what you MAY have stirred up. It wouldn't be the first high pressure GM fuel filter that I have heard of being plugged or partially plugged.

Good luck my friend.

We Gone · 06-04-2018

First not a believer in seafoam second I would have added at least 5 gals if it was that low.

You may as well remove the pumps clean out the tank change the filter add a proper amount of gas and try again for starters.

QB93Z · 06-04-2018

I had a similar problem with a 1995 that had not been run for a long time. I picked it up from the seller and drove 120 miles to Las Vegas with no problem. The next morning I easily drove up Las Vegas BLVD. Stopped and filled the tank with gas. Drove one and a half blocks and the engine stumbled and died. I barely got it back to the hotel. With help from Ted Dempsey (Thanks Ted) I replaced the injectors and the car has run fine for 46,000 miles.

Jim

George Maz · 06-04-2018

Why not check fuel pressure at the plenum port first? ...before tearing into anything else which may introduce more unrelated problems.
Once you've determined fuel pressure issue, then you can work your way upstream to the fuel pumps and gas tank. If adequate pressure then proceeded downstream to injectors.

2 gallon / 1 bottle seafoam, is way too concentrated ...dangerous. Add 10 gallons of 93 after you've done these checks.

1990 Dark Red Metallic, only 181 made, wouldn't give up on it so quickly. Sort out the typical zr-1 issues, and you'll have a fun driving car this summer. This forum has a tremendous amount of support for owners, fixers.

My car had the fuel pump hose clamp loosen and fall off. It sputtered and quit. Took me half the day to figure it out, easy fix, after a few phone calls. Thanks to Marc Haibeck, got me running again!

06-04-2018	#1
Hog Join Date: Jul 2010 Location: Woodstock, Ontario, Canada Posts: 1,275	Re: need help please! If the tank was empty and you added 2 gallons with Seafoam, you COULD have disturbed all sorts of rust/corrosion into the fuel system. A quick fuel filter swap with an inspection of the old filters internals can reveal what you MAY have stirred up. It wouldn't be the first high pressure GM fuel filter that I have heard of being plugged or partially plugged. Good luck my friend. __________________ peace Paul ZR-1 Net Registry Member #1494

06-04-2018	#2
We Gone Join Date: Apr 2004 Location: ATL. GA. Posts: 2,162	Re: need help please! First not a believer in seafoam second I would have added at least 5 gals if it was that low. You may as well remove the pumps clean out the tank change the filter add a proper amount of gas and try again for starters. __________________ Steve 1990 Steel Blue/Black #2355 1990 Red/Red #1473 1991 Quasar /Black #118 Sold 1991 Turquoise/Black #766 Parted Out 1993 Yellow/White #179 Sold 1990 Black/Gray #1361 Headers/4:10s Sold

06-04-2018	#3
QB93Z Join Date: May 2007 Location: Westminster, Maryland Posts: 3,687	Re: need help please! I had a similar problem with a 1995 that had not been run for a long time. I picked it up from the seller and drove 120 miles to Las Vegas with no problem. The next morning I easily drove up Las Vegas BLVD. Stopped and filled the tank with gas. Drove one and a half blocks and the engine stumbled and died. I barely got it back to the hotel. With help from Ted Dempsey (Thanks Ted) I replaced the injectors and the car has run fine for 46,000 miles. Jim __________________ If it isn't fun, you aren't doing it right! 1990 Black ZR-1 - sold 1993 Quasar Blue ZR-1 1994 Competition Yellow ZR-1 1995 Dark Purple ZR-1 Maryland State Coordinator WAZOO Member

06-04-2018	#4
George Maz Join Date: Dec 2014 Location: Long Island, NY Posts: 295	Re: need help please! Why not check fuel pressure at the plenum port first? ...before tearing into anything else which may introduce more unrelated problems. Once you've determined fuel pressure issue, then you can work your way upstream to the fuel pumps and gas tank. If adequate pressure then proceeded downstream to injectors. 2 gallon / 1 bottle seafoam, is way too concentrated ...dangerous. Add 10 gallons of 93 after you've done these checks. 1990 Dark Red Metallic, only 181 made, wouldn't give up on it so quickly. Sort out the typical zr-1 issues, and you'll have a fun driving car this summer. This forum has a tremendous amount of support for owners, fixers. My car had the fuel pump hose clamp loosen and fall off. It sputtered and quit. Took me half the day to figure it out, easy fix, after a few phone calls. Thanks to Marc Haibeck, got me running again! __________________ 1990 ZR-1 #1587 1990 ZR-1 #1727 Last edited by George Maz; 06-04-2018 at 09:51 PM.