Question about 1991 Chevrolet Lumina

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Car wll not start ECM 20 amp fuse next to fuel pump relay is blown, fuse blows everytime I turn the key to the run position

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Fuel pump is bad. pump motor is shorted.

Posted on Dec 08, 2010

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HONDA NOT STARTING AFTER ECM RESET


Resetting the ECM does not lead to any starting problem, though the idle speed re-learning is required. Check carefully there could be something else that is creating a problem for you.
Check:
- The fuse number 20 (15 Amp) located in under the dash fuse/ relay box, if it is blown.
- Check battery.
- Check starter.
- Check if there is enough fuel in the fuel tank.
- Camshaft Position (CMP)sensor.
- Crankshaft Position (CKP) sensor.
- Fuel pump circuit

Feb 21, 2013 | Honda City Cars & Trucks

1 Answer

I replaced the fuel pump relay, noticed that i had a blown fuse marked ecm. repaced that.ran truck for around 20 min.turned off. when i went to start again it wouldnt. looked at that same 20 amp fuse


There are two ECM fuses - marked ecm 1 and ecm B.
ECM B powers the fuel pump and the Veh control module which handles most of the sensors.
ECM 1 powers the ignition module, coil, injectors and the rest of the engine sensors.
You may need a repair book with diagrams to check all of the circuits for shorts.

Jul 30, 2012 | 1999 GMC Sierra 3500

2 Answers

1993 Buick Roadmaster keeps on blowing fuel pump/ecm in-line 20 amp fuse. Car stalled out in a parking lot, would not start, no fuel. Changed fuel pump, fuel filter, fuel pump relay. Found fuel pump/ecm...


Sorry to say it could also be a faulty ECM. The ecm uses circuit boards to provide grounds to a bunch of components and can short out internally.
Most of those components can fail and cause the same problem by causing a short "thru" the ECM. Things like injectors, O2 sensors, and so on.
I doubt you will find the problem without a book and some test equipment.

Jun 29, 2012 | Cars & Trucks

2 Answers

I have a 96 chev blazer it had a leaky fuel line i replaced it it fixed the problem , after a few months it wouldnt start so i sprayed starting fluid and it got me 60 miles now wont start i replaced fuel...


Injector pulsation in control by your E.C.M quade driver none repairable computer just get's replace to fix the problem, good luck. Also one more thing check your E.C.M fuse.

May 14, 2010 | 1996 Chevrolet Blazer

2 Answers

1993 rodeo not running no power to fuel pump


if there is no power to the fuel pump check relays and fuses....UNDERHOOD FUSE & RELAY PANEL IDENTIFICATION Fig. 2: Underhood Fuse & Relay Panel Identification Courtesy of ISUZU MOTOR CO. Fusible Link Identification ? A - 80 Amp (1991-92 3.1L) ? A - 60 Amp Main-1 ? B - 30 Amp Main-2 ? C - 30 Amp (1993-94) ECM (3.2L) ? D - 30 Amp Condenser Fan (A/T Models) Relay Identification ? 1 - Headlight Relay ? 2 - A/C - Heater Relay ? 3 - Starter Relay ? 4 - A/C Compressor Relay ? 5 - Charge Relay ? 6 - Fuel Pump Relay ? 7 - ECM Relay ? 8 - Wiper Relay Fuse & Circuit Breaker Identification ? 1 - 15 Amp (1991) ECM, Fuel Injection System ? 1 - 15 Amp (1992-94 2.6L) ECM, Fuel Injection System ? 1 - 10 Amp (1992-94 3.1 & 3.2L) Heated Oxygen Sensor, Fuel Injection System ? 2 - 20 Amp (1991-92) Fuel Pump ? 2 - 20 Amp (1993-94 2.6L) Fuel Pump ? 2 - 15 Amp (1993-94 3.2L) Fuel Pump ? 3 - 10 Amp (1991) ? 3 - 15 Amp (1992-94) Turn Signal Lights, Hazard Warning Flasher Lights ? 4 - 10 Amp Horn, Door Locks ? 5 - Not Used (1991 3.1L) ? 5 - 10 Amp Charging System, Charge Warning Light WARNING: Always disconnect battery ground cable before servicing "high- current fuses. It is recommended that "high-current" fuses be replaced by a qualified technician. Page 1 of 2 FUSES & CIRCUIT BREAKERS -1994 Isuzu Rodeo LS? 6 - Not Used (1991) (1992-93 2.6L) ? 6 - 10 Amp (1992-94 3.1L & 3.2L) A/T Interlock System ? 6 - 10 Amp (1994 2.6L) Heated Oxygen Sensor, Fuel Injection System ? 7 - 20 Amp Heater/Air Conditioning Blower Controls ? 8 - 10 Amp Air Conditioner Compressor Controls ? 9 - 10 Amp Right Headlight ? 10 - 10 Amp Left Headlight © 2008 Mitchell Repair Information Co., LLC.
62217_isuzfuse_1.jpg
Underhood fuse block swap out relay #7 thats the ECM relay.
Ground Circuits Using a DVOM, touch negative voltmeter lead to a good ground. Touch positive voltmeter lead to each ground terminal. With vehicle running, voltmeter should indicate less than one volt. If reading is greater than one volt, check for open, corrosion and loose connection on ground lead. See ECM GROUND LOCATION table for ECM ground location.
Page 1 of 1 SYSTEM/COMPONENT TESTS - 2.6L EFI -1994 Isuzu Rodeo

Mar 28, 2010 | 1993 Isuzu Rodeo

1 Answer

Trouble starting doesnt seem to want to fire


Check the fuses, I had one a while ago that kept blowing one of the ECM fuses. There are 2 ECM fuses one also sends power to the fuel pump too. Do you hear the fuel pump run when you turn the ignition switch to on? Just turn the key to the "on" position, not all the way to start, you should be able to hear the fuel pump run for about 3-5 seconds. I think it takes a 15 amp, I showed the owner which fuse it was and it would blow occasionally. One day it blew one right after another so he put a 30 amp in, he was out of 15's. I told him that was not a good idea. Anyway, that fixed it he drove it home and put a 15 amp fuse back in it, it's been good ever since.

Nov 30, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

I have a 97' f150 4.2 eng 2 wheel drive pickup elect. problem


A fuse blown is a short, and a short is a ahort.
The fuse is the ecm so unplug the ecm and see what happens. If the fuse holds with theecm unplugged, then it is your ecm that needs relacement. If it still blows, The short is in the wiring.go to the parts store and pick up and automatic circuit breaker. It plugs in where the bad fuse goes. It will trip and reset itself automaticallly like a flasher until you have located the short. trick, Start with a breaker of amp. examole; if you took out a 20 amp, put in a 10 amp so the breaker trips faster, On and off quicker so you don't have to wait between ressets. If you want to trace the short by the wiring, put a 25 amp or with great caution a 30 amp. That is the limit. The wire will get warm on the 25 and even warmer on the 30. Pay attention that the wire does not get hot. Hopefully yhe 25 will get the wire warm enough for you to follow. Good Luck, Ned. This method is dangerous if you don't pay very close attention using the high amp breaker. There is a risk of fire if the circuit cannot handle 30 amps. In fact, only yuse the 30 amp breaker if the 25 breaks and resets too fast. Good Luck_Ned_

Oct 04, 2009 | 1997 Ford F150 Regular Cab

3 Answers

1999 Hyundai elantra died while driving found ecu fuse blown replaced lasted half a mile and blew again


Check your o2 sensor harness. The harness if not properly secured will rub on the axle to a point where it rubs through the insulation of the wire & shorts on the axle causing the ECU fuse (20A) to blow. Repair the harness & replace the fuse & bada bing! You should be in business! Hope that works. IF NOT follow this K.I.S.S.

Keep It Super Simple! It never fails!

Jun 04, 2009 | Hyundai Motor 1999 Elantra

1 Answer

ECM BATT fuse keeps blowing


That fuse provides power for the fuel pump. Either your fuel pump is blowing the fuse or there is a shorted wire.

Nov 22, 2008 | 1995 GMC Jimmy

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