91 camaro trouble with fuel pump priming - Third Generation F-Body Message Boards

thirdgennewie · 02-01-2010, 03:38 PM

Hello everyone , I am getting no fuel pump signal to the relay while starting. 10.8v between the orange and gray wires on the FP relay connector when ignition switch is in the on or off position but no start. If I jump gray wire at connector with known good 12v supply the FP runs and car starts. When I measure volts between Orange and gray wire with the car running I get 12v. Disconnected the OPSU, 3 wire, red,yellow,black, and tried to start. Nothing. Jumped and measured voltage at red and black wires at OPSU (2.4v) and nothing. Relay is good. FP fuse is good. Where should I look next? Seems like I am not getting a signal to prime the FP.

NINÅ · 02-02-2010, 02:19 PM

Is the SES light on?

Did you scan codes?

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Happy Racing!

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If People Drove Any Slower They’d Be Going Backwards

When you see fog or “running” lights on in good weather beware. Low performance driver ahead.

How bout those nitwits too scared to drive without headlights in the daytime

and the nitwits that need headlights for a little rain

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.

thirdgennewie · 02-02-2010, 02:22 PM

the ses light is not on , an i didnt get the codes yet? do you think the ecm is bad?

NINÅ · 02-02-2010, 04:14 PM

Probably.

The driver transistor for the relay burns out on those ECMs.

◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!

◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙

If People Drove Any Slower They’d Be Going Backwards

When you see fog or “running” lights on in good weather beware. Low performance driver ahead.

How bout those nitwits too scared to drive without headlights in the daytime

and the nitwits that need headlights for a little rain

.
.