88 corvette HELP!!!
Thread Starter
Intermediate
Joined: Jan 2019
Posts: 41
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Thanks for the info: this is what ive done so far....
My car would just die from time to time...let it sit awhile then it would start..now it starts at times then dies in a few minutes..what ive done so far...code 36 mass air flow came up...
I changed mass air sensor and relay and burn off..
Icm unit..
Fuel pump
Fuel pump relay
New battery
New fuel filter
Still not starting!!
When i spray starting fluid in it it will start for a few seconds..
One of my questions is..i know the mass air flow relay and burnoff and fuel pump relay all serve a different function..but is the relay replacment part for these 3 things the same..
My car would just die from time to time...let it sit awhile then it would start..now it starts at times then dies in a few minutes..what ive done so far...code 36 mass air flow came up...
I changed mass air sensor and relay and burn off..
Icm unit..
Fuel pump
Fuel pump relay
New battery
New fuel filter
Still not starting!!
When i spray starting fluid in it it will start for a few seconds..
One of my questions is..i know the mass air flow relay and burnoff and fuel pump relay all serve a different function..but is the relay replacment part for these 3 things the same..
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
According the the schematic on Mitchell, they're not the same. The MAF and MAF burn off are the same, but the FP relay is different. According to Mitchell.
Did you ever determine if spark or fuel is your no start problem?
Did you ever determine if spark or fuel is your no start problem?
Thread Starter
Intermediate
Joined: Jan 2019
Posts: 41
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I think i installed a mass air flow sensor relay in the spot of the fuel pressure relay....also i put a new fuel pump in and the car started for a few minutes then died..when trying to restart i cant hear the pump coming on now where i did right after installing it...a couple times id unhook the batt...the car would start a few minutes then die..... a garage Quoted me at $91 an hour to try to find a solution to this that's a bit expensive for my taste and budget at the moment so I'm trying to tackle this on my own
Last edited by Eddie77; Mar 10, 2019 at 08:27 PM.
Safety Car
Joined: May 2001
Posts: 4,747
Likes: 1,642
From: Fairfax Virginia
Hello Eddie77,
Do the test that TOM400CFI suggested first. Then tell us what happened.
If you can do it safely try applying power to the pump directly IF the pump doesn't turn on. Don't do anything with gasoline fumes around, please! I applied power to the pump watched it run and still I had no pressure. It became obvious that there was a blockage in my case.
You have replaced a lot of parts there my friend! The first and most important thing to get is a set of factory service manuals for your particular year Corvette. They are very useful to both the experienced and not so experienced as they contain a ton of useful information. Unfortunately they are not cheap but they are worth every penny in a tough situation with your Corvette.
Keep the answers to our questions coming! Good Luck. With the great people here at this site somebody will know how to get your Corvette on the road instead of the garage!
Do the test that TOM400CFI suggested first. Then tell us what happened.
If you can do it safely try applying power to the pump directly IF the pump doesn't turn on. Don't do anything with gasoline fumes around, please! I applied power to the pump watched it run and still I had no pressure. It became obvious that there was a blockage in my case.
You have replaced a lot of parts there my friend! The first and most important thing to get is a set of factory service manuals for your particular year Corvette. They are very useful to both the experienced and not so experienced as they contain a ton of useful information. Unfortunately they are not cheap but they are worth every penny in a tough situation with your Corvette.
Keep the answers to our questions coming! Good Luck. With the great people here at this site somebody will know how to get your Corvette on the road instead of the garage!
Burning Brakes
Joined: Jan 2017
Posts: 961
Likes: 237
From: Diamondhead Mississippi
St. Jude Donor '17-'18-'19-'20-'21-'22
Thank you everyone for your help.....i have 1 more question....is the fuel pressure relay the same as the mass air flow relay....
Meaning are both the relays the same..i.e..i installed a mass air flow relay where the fuel pressure relay spot....i read they were the same unit...
Meaning are both the relays the same..i.e..i installed a mass air flow relay where the fuel pressure relay spot....i read they were the same unit...
Advanced
Joined: Oct 2017
Posts: 88
Likes: 21
Simply hit terminal G with 12V power and listen to hear the pump running. You'll be able to distinctly hear the pump by putting your ear by the filler door if you hear nothing then the pump isn't receiving power.
Did you install the fuel sock on the end of the pump during install? If not existing debris will jam it up right away. I've had this happen with customer cars before. In one case the fuel sock had come off.
If that's the case pull the pump and bench test 12v away from from the tank and fuel source.
Relays are all the same, I've pulled them in past jobs for more passenger foot well clearance and the order doesn't matter on reinstall.
If your not getting power to the pump did you check the fuse, there's also a fusable link on these cars as well from what I'm reading. Check the wiring for a proper circuit.
Report back your findings.
Did you install the fuel sock on the end of the pump during install? If not existing debris will jam it up right away. I've had this happen with customer cars before. In one case the fuel sock had come off.
If that's the case pull the pump and bench test 12v away from from the tank and fuel source.
Relays are all the same, I've pulled them in past jobs for more passenger foot well clearance and the order doesn't matter on reinstall.
If your not getting power to the pump did you check the fuse, there's also a fusable link on these cars as well from what I'm reading. Check the wiring for a proper circuit.
Report back your findings.
Last edited by VETTLIFE; Mar 12, 2019 at 07:19 AM.
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Thread Starter
Intermediate
Joined: Jan 2019
Posts: 41
Likes: 0
Thanks everyone
After a month-and-a-half of stressing out and a month and a half of posting on corvetteforum reading all of your replies and all of your help what turned out to be wrong with my Corvette was the fuel pump assembly sender unit.... we came to this conclusion after I done replaced five other things I thought it could be..lol.... but it looks like I will be back on the road this coming spring thanks for all your help everyone...
Drifting
Joined: Jun 2018
Posts: 1,678
Likes: 229
From: Michigan
Also as a side note please do not send me all these pictures of diagrams and wiring units and all this other crap because I am not a car guy I do not understand it I would like to know is a plain and simple answer of what you feel I might need to change on my car to solve my problem....
This does not surprise me. You can throw parts at it and lighten your wallet, or you can learn to troubleshoot with the help of people here. There are not simple answeres without troubleshooting. There are a lot of things that can cause a lack of fuel delivery. Glad you found your issue, but look at what all it cost you. You should start learning how to read the schematics and flow charts. Nobody came out of the womb knowing how, we all had to learn.