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Fuel pump problem

Tiny
LAUTARO
  • MEMBER
  • 1997 CHEVROLET MONTE CARLO
  • 6 CYL
  • FWD
  • AUTOMATIC
Monte carlo 97 no power to fuel pump, fp rely have current on top left terminal of fuse panel, how to bypass fp rely or what you recommend. Initially stall when normally running and the fuel gauge went to full, I spray some starting fluid and engine run for a while. So I changed f pump (mistake) and it dont activate, then I check rely and as I said before power on the top left side terminal of fuse panel.
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Saturday, April 2nd, 2011 AT 5:04 PM

5 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Check for spark at the plugs and injector pulse, engine cranking. If nothing, look for rpm signal. Without rpm signal, you get nothing.

Key on engine off, can you here pump prime for a few seconds?
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Saturday, April 2nd, 2011 AT 6:21 PM
Tiny
LAUTARO
  • MEMBER
  • 3 POSTS
There is no injector pulse, the pump prime if I bypass the rely, I start the car using starting fluid and stay running as long as I spray st fluid, now tell me how to check the rpm to try that thanks very much
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Saturday, April 2nd, 2011 AT 9:25 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
I suspect the two wire crank sensor has a problem. Did you visually check for spark at the plugs, engine cranking? With bypass ignition, during cranking, it is the ignition module that controls spark, but, the ignition module has to receive trigger signal from that two wire crank sensor. It is possible, your ignition module could have a problem? That crank sensor is cheaper. You might also check voltage and ground at the ignition module.
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Sunday, April 3rd, 2011 AT 5:10 PM
Tiny
LAUTARO
  • MEMBER
  • 3 POSTS
About 8 months ago I did change ignition module and coils but any way I will do all your recommendations. I think I will go to crank sensor first as you said hopefully this is the big problem. So thanks very much JDL I`ll be in touch with you to let you know results.
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Sunday, April 3rd, 2011 AT 6:40 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Goodluck
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Sunday, April 3rd, 2011 AT 6:59 PM

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