My truck just died on the road.
F250 91 5.0 (302) 4X4
I replaced the ICM with an old one that I pulled from the 5.8 block, had it tested. tested good.

I have fuel, pump is working.
I have 12 volts to my coil.
my fuel safety switch is good.

what should I test to find the problem

Thanks Keith

 

I would start by checking for spark to the plugs . If none , check spark to the cap . Could be a bad rotor , moduel , pick up , etc . If good spark , check for injector pulse and proper fuel pressure . That is where I would start .

 

Last week I had replaced all the plugs and gap them. with new wires rotor and cap. new ICM, ECU, MAP, EGR valve, engine wiring harness, fuel pump, fuel filter, pressure regulator, injectors.

How do check the spark when I have to put the clutch in.

I mean it died wile driving on the road, could not jump start it. last time this happened it was my ICM. I have not gotten my truck home yet to pull the code on it

I spent so much money already just to have something else go bad, this truck is driving me crazy

 

You can check spark with a spark tester , buy them at parts stores . You can block the wheels , put on the parking brake , put truck in neutral . DOUBLE CHECK for safety , check again . With key in the run position , jump small terminal of starter solenoid to battery + , watch for spark . You can check injector pulse the same way ( using a noid light ) . Why have you replaced all the parts you listed ? Problems with all? Guessing ? Just curious ...

 

One more thing , you stated you could not jump start it .... Was your Battery dead ? Did the starter not operate ?

 

Battery is fine, full 12 volts, starter is working correctly.

I had a problem with my TPS, it was flooding the engine and found that my ECU computer was faulty and sending a negative / positive cross thru my engine harness.

I am running to the parts store to have my PCM tested

 

I don't know what's wrong with your truck, but I did notice you're in Hawaii, so how bad can it really be! Tell you what - let's switch. You can have my running truck and the -32 windchill and 12" of snow here in Detroit, and I'll take your truck and all it's issues as long as I'm in Hawaii. Deal?

 

Check all your sensors for a short to ground that pulls your 5 volt reference voltage low ! You could have a bad sensor elsewhere in the system . That can cause issues , no start , stall , no communication .

 

LOL: When summer time comes, I will let you know.

 

Thanks I will run checks for that.

I had my ICM tested it was dead. I just replaced it two week ago and the one I replaced not even a year old. Napa had a replacement for me, I asked them to test it first, the new one also was bad. what's going on with the cheap parts.

do you think I might have something else going on that might be causing the PCM to short out or stop working correctly?

 

Russian parts, American parts, Canadian parts ALL MADE IN CHINA !!!!!!

 

I hear ya! my starter from Napa I replace three times in two weeks, I ended up buying a two hundred dollar starter. Its lasted for two years and stilling strong (US made).

90% of the time I am returning parts two or three times too find one that works.

Crazy crazy I say

 

I lived in battle creek went to school at St Philip.
I know what your going thru.

 

Lots of parts are just junk now . I put a water pump on a Hummer 2 months ago . It got towed in last week , The pulley BROKE off at the weld . The WELD Failed ! Thankfully no other damage , besides the belt . I am tired of bad parts . 3 MAF sensors on a VW , 2 fuel pumps on a Porsche , all aftermarket ... But , I even get them from GM , Ford , Dodge , Nissan .... well , you get the picture . It is not just affecting aftermarket suppliers , OE suppliers are having issues .

 

I put the new ICM my truck fired right up. I think I am having issues with the EEC replacement I got from Napa, the EEC I exchanged was in better shape then the replacement.

It is costing me more money replacing parts two three time. there has to be a better supplier for automotive parts