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95 GMC turns over won't start replaced ecm fuel pump relays cap and rotor any ideas on what to check bext

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What engine does it have ? Did you check for spark , fuel pressure ? No Start Diagnostic Basics EricTheCarGuy

Posted on Apr 21, 2015

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Posted on Jan 02, 2017

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Where is ecm on 95 gmc jimmy


The ECM on the jimmy, is located on the passenger side fender well by the overflow tank. But before replace the ECM, inspect the fuel pump and fuel pump relay. The ECM sends power to the fuel pump relay and if the relay has gone bad will cause the fuse to blow which will kill the the power to the ECM, in turn kill the electrical power to the ignition system.

Start by removing the fuel pump relay and swap it with another relay and see if the fuse will blow again, if is does. Disconnect the fuel sending unit wire harness at the frame and see if the fuse blows again, if the fuse stays good. Chances are your fuel pump has gone bad or the fuel filter is dirty/clogged causing your fuel pump to draw more amp and will need to be replaced or the wire harness from the frame to the sending unit has a short which is common on older Jimmy's.

Here is a link to the electrical harness throughout the Jimmy.
http://www.compnine.com/index.php?t=...lid=6872&uid=1

Mar 06, 2014 | 1988 Mazda B2200

2 Answers

Civic starting problem


there is a relay called PGM main relay.they go bad.check to see if you get power going to it and coming out of it.

Jul 18, 2013 | Cars & Trucks

3 Answers

Changed coil ignition module cap and rotor a week ago, now doing same thing again, it'll turn over all day long has fire but won't start like it has no fire.


are you getting FUEL ? are you sure ? you might need to replace both the air& fuel filters !!!!!!!!!!!!!!!! fuel pump may be bad !

Mar 08, 2013 | 2000 GMC Jimmy

1 Answer

No fuel and no spark


fuel pump , fuel pump relay on fire wall, fuel filter, may all need replaced, pump in tank, inspect all wiring in this circuit, especially all grounds,, grounds get overlooked & that is sometimes the problem. I have a 1988 gmc 2500, I 'm talking from experience. can you hear if fuel pump runs for 2 seconds, when you turn key on ? if not, ground problem or pump problem. relay has a fuse in it, check that. check all fuses. NOW, spark ! coil ? plug wires ? distributor cap & rotor ? replace them if you haven't !!!!!!!!!! get to work, see how you do ! good luck !

Mar 05, 2013 | 1989 GMC K1500

1 Answer

Won't start


Check the fuel injectors, with the key on one side of the two wire connector will have battery voltage, if none is present then check the ECM fuses in the underhood fuel box.

Jun 22, 2017 | 1999 GMC Sonoma

1 Answer

96 GMC pickup w 350 engine, starts hard after like 8 hours.


could be your fuel pump relay you should check to see if the pump runes for about 3 sec. when you turn the key to the on position. It should if not the oil switch is turning on the pump after you achieve pressure.
if not check the relay. also with the pressure gauge hooked up check if your pressure drops off fast after you turn off the car. if so you need ether a pressure reg or a fuel pump.
hope this helps

Jun 20, 2009 | 1996 GMC Sierra

2 Answers

94 jeep wrangler. Replaced fuel pump relay, fuel pump, cap, rotor


i was having the same problem with my 95 jeep rio grande. i replaced , rotor and cap, sparkplug wires, sparkplugs, pick up plate, ignition coil. come to find out my ecu/ecm was bad . i replaced it and i havent had a problem since.

Jun 05, 2009 | 1995 Jeep Wrangler

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