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1993 chvy lumina...no communication with scan tool...no injection pulse...have good spark and fuel pressure...have changed ignition mudule, ecm, and crank sensor have power at main wire at coils..all fuses are good..can ground no. 1 injector through harness and get car to fire but dies right away...

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  • 21 Answers

There is a fule psi. switch remember for fuel injection systems
the psi. has to be high or it could be bad

Posted on Nov 01, 2012

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Posted on Jan 02, 2017

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SOURCE: 1993 honda accord 2.2,no injector pulse

This sounds like a main relay problem here is a diagram its located under the dash under steering column its the brownish -orange box in the picture. http://www.tegger.com/hondafaq/mainrelaylocation/7-main_relay_closeup.jpg Good luck and thanks for using FIX YA

Posted on May 15, 2009

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SOURCE: 1996 Jeep Grand Cherokee No Start

i have a 1996 jeep grand cherokee and im not getting spark to the plugs.i replaced the crankshaft sensor and ignition coil already and still having problem.if i replace the camshaft sensor would that fix the problem ??? Or what should i do ???

Posted on Jul 23, 2012

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How to check pcm, no spark,no fuel, no injection pulse.99 ford mustang 3.8 v6


When you turn ignition key on ( not start ) does the checking light ,light ? Check fuse's for PCM , are they good ? Find a wiring diagram an check power an ground at PCM . Also hook up a scan tool an see if it will communicate with the PCM . That's how you check the PCM ! Also check the constant control relay module , these go bad an they have fuel pump relay , power hold relay , this powers up fuel injectors an ignition system !

Jan 08, 2016 | Ford Cars & Trucks

1 Answer

It died going down the it has gas and i changed the ignition mudule


Did you check for spark at the plugs before you replaced the module ?
You would need to figure out if you are missing spark to the plugs or fuel pressure to proceed.

Sep 30, 2012 | 1992 Chevrolet Lumina APV

1 Answer

Hot spark, good fuel pressure, but no injector pule


Be sure to check the injectors for a short. I found #1 injector bad when I disconnected the harness from it and the engine fired up. An ohms check verified the short, should be about 12 ohms, mine was 2 ohms. I also saw a response that indicated that the ECM controlled the injectors on the positive side of the harness. This is in error. The ECM controls the injector by grounding the negative side with a quad driver.

Jul 26, 2012 | 1991 Chevrolet Lumina

1 Answer

My 98 gmc 1500 V8 5.0l won't start. Has good spark


Spray starting fluid into the air intake of the engine, if it starts and you have fuel pressure you have no injection or injector pulse as we call it. Check ECM fuse one and two for continuity if it starts with fluid..

May 25, 2012 | 1998 GMC Sierra

1 Answer

I have a 1993 chevy lumina. will not start, has good fuel pressure, good spark, it will start if i put fuel in the throttle body then dies when the fuel burns up cant figure it out


check for injection pulses at the injectors.
Each injector has two wires, one is a supply (12Volt) and the other is grounded by the engine management unit. The switching is very fast so you would not detect it with a test light. Try a multimeter set to frequency. If you check the supply to the injectors, disconnect ALL of them at once. You should have power to only one wire at each injector plug. If no power is present, check the fuel system relays and fuses.

Mar 10, 2011 | 1993 Chevrolet Lumina

3 Answers

1993 buick skylark w/ 3.3 V6. Died at stop


You have 35 psi of fuel pressure and injection pulse?

Jul 08, 2010 | 1993 Buick Skylark

2 Answers

1993 Chevy Lumina


what about your antitheft system i have seen lots of ign key cylinders go bad and cannot read the keys resistance

Oct 09, 2009 | 1993 Chevrolet Lumina

3 Answers

My car is not firing . i replaced the ignition controle module and it's still not firing.


You need to 1st determine if the computer is even trying to start it before you start lobbing parts. Look at the CHECK ENGINE lamp while you crank it. If it stays on bright while cranking, the engine will not get any signal to fire spark or fuel because the computer is not seeing RPM signal while cranking. If the light goes OFF while cranking, the crank signal was seen, however there could still be fuel or spark issues from other causes. You really need to determine if you have spark or fuel as the next step after verifying rpm signal. There are no cheap tricks for most of this work, it takes tools and training to determine the exact cause of failures. Does the ECM communicate? Is the EEC relay functioning, does the fuel pump prime up at Key On? Is there injector pulse? Fuel pressure? 30kv of Spark that is also reaching the plugs?
These are the steps to check to determine how to not buy a wasted part as the next step.

Sep 15, 2009 | 1993 Ford Mustang

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