88 gta won't start (solved)
#1
88 gta won't start (solved)
I have a 1988 gta 5.0l engine, I put it away for winter and it started and ran fine but about 1 month ago I went to start it and it would start then stall right away, I assumed it was a bad fuel pump because I had no fuel pressure,so I bought a new pump and replaced the old one and it fired right up and stayed running, then I shut it off and later in the day I went to start it up again and it would crank but not start, i took the pump back out and it's fine,
I have 3 wires in back of the rear seat black,tan and pink and for the pump it's black,grey and purple I have constant power to the purple wire only even when ignition is on but pump don't turn on any ideas?
I have 3 wires in back of the rear seat black,tan and pink and for the pump it's black,grey and purple I have constant power to the purple wire only even when ignition is on but pump don't turn on any ideas?
Last edited by jmopar; 03-28-2017 at 06:38 PM.
#3
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Re: 88 gta won't start
Yes there is a fuel pump relay on the drivers side of the firewall. The pump is controlled by the computer and you should have hot at all times on the Orange wire, and fuel pump power leaves the relay on the Tan/White wire. If you have power on the Orange wire jump it to the Tan/White wire and see if it will start. If it does you need to test the relay or find out why it isn't being triggered, etc.
Rick
Rick
#5
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Car: 89 Z28
Engine: tbi 305
Re: 88 gta won't start
Hi Jmopar,
I had similar problems. Where the connector goes through the tank gave me an intermitent connection. It drove me nuts working and then not. I'd check it with a meter and wiggle the plugin. If you see the meter jump you know the connector is no making good connection.
al
I had similar problems. Where the connector goes through the tank gave me an intermitent connection. It drove me nuts working and then not. I'd check it with a meter and wiggle the plugin. If you see the meter jump you know the connector is no making good connection.
al
#6
Re: 88 gta won't start
Yes there is a fuel pump relay on the drivers side of the firewall. The pump is controlled by the computer and you should have hot at all times on the Orange wire, and fuel pump power leaves the relay on the Tan/White wire. If you have power on the Orange wire jump it to the Tan/White wire and see if it will start. If it does you need to test the relay or find out why it isn't being triggered, etc.
Rick
Rick
#7
Re: 88 gta won't start
Ok so I pulled the fuse the one between the radiator and battery and put it back in and now I have power to the orange wire but nothing on the tan wire
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#8
Re: 88 gta won't start (solved)
Figured it out thanks for all you're help, it was the fuse between the battery and radiator weird thing is the fuse looks fine but was faulty.
#10
Re: 88 gta won't start
Yes there is a fuel pump relay on the drivers side of the firewall. The pump is controlled by the computer and you should have hot at all times on the Orange wire, and fuel pump power leaves the relay on the Tan/White wire. If you have power on the Orange wire jump it to the Tan/White wire and see if it will start. If it does you need to test the relay or find out why it isn't being triggered, etc.
Rick
Rick
#11
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Car: 92 Camaro RS
Engine: LO3
Transmission: T5
Axle/Gears: stock
Re: 88 gta won't start (solved)
On the firewall almost to the edge of the drivers side is a metal bracket with two identical relays behind it. The one closest to the edge is usually the fan relay and has four wires going to it. The one next to it with five wires going to it is the fuel pump relay
This is for the Camaro guy
This is for the Camaro guy
#12
Re: 88 gta won't start (solved)
Ok, I found the relay. It looks a little different from your pic, but has the five wires. The orange wire had power, so I jumped it to the tan and white wire. It still would not start. Sounds like no fuel. I have replaced the pump and filter. Any other suggestions?