Question about 1995 Isuzu Rodeo
First things first...Rewiring the fuel pump will only put a "Bandaid" on whatever the problem really is and will most likely create a situation where wires are draped across places where they shouldn't be, causing all kinds of future electrical problems. I have had to clean up that type of mess too many times.That type of "shade-tree" repair makes proper diagnosis and repair of a vehicle nearly impossible, even by a trained technician. My recommendation: DON'T EVEN THINK ABOUT IT!
OK, Now that I have my preaching out of the way...
The check engine light is supposed to come on every time you turn the key to the "On" or "Run" position before starting the engine. This is for a "bulb-check" just to let you know that it is not burned out. It should go out immediately after the engine starts and should stay off the entire time you are driving the car. It is not any type of indicator to let you know that the fuel pump has run. If your check engine light is not coming on every time you turn the key to "On", then there is probably a problem with your ignition switch or your ECM Main Relay. Either of these can cause an intermittent failure of the ECM to power up, a)d thus, not turn the check engine light on. Failure of the ECM to power up will also cause the fuel pump to not run because like the check engine light, the fuel pump is controlled by the ECM. (Rewiring the fuel pump will not make the engine start if this is in fact what the problem is.)
I have also seen many fuel pumps that run when they want to. You could have a bad fuel pump, but refering to your statement about the check engine light, I would guess that the fuel pump is not the main problem or even if it is a problem at all.
Posted on Dec 29, 2010
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Posted on Jan 02, 2017
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