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Old 02-12-2003, 12:11 PM
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Post 1987 IROC

No power. When I used to turn the ignition to the on position, the fuel pump in the tank would run 2 - 3 seconds like it was supposed to do. Now when I turn the ignition switch to the on position, the pump does not run. When I start the engine the pumps runs all the time. I have replaced the mechanical pump on the engine and changed the carb filter. Anything over 1/2 throttle, the engine falls down until I back off the throttle and it picks up again. Since the pump is getting power I assume the problem is a sensor. Any help would sure be appriciated.

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Old 02-12-2003, 01:17 PM
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You're going to have to clear some things up here. You start out talking about hearing the fuel pump run when you turn the key to the "ON" which would indicate a fuel injected car, but then you started talking about the mechanical pump and the carb filter. A mechanical pump would indicate a non-fuel injected engine. What filter do you mean when you say "carb filter"?
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Old 02-12-2003, 01:24 PM
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I am confused, if the pump in the tank is working that means (to me) that the car was once an injected car and is now a carb car at any rate sounds like mabey the seconadarys are opening but the metering rods are not lifting if its a QJ.good luck.
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Old 02-12-2003, 09:08 PM
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Sounds like the fuel pump relay switch to me. Change it and the electric pump should work fine.
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Old 02-14-2003, 08:49 AM
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I would be suspicious of the electric pump, but I'm not very familiar with your setup so I can't offer too much help.
You might try asking the guys <a href="http://www.f-body.com/forum.cgi" target="_blank">here</a> about it. There are some very sharp guys there who are very helpful.
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