its a very strong blowing out that comes out of the intake manifold with some smoke.and it does smell like gas (no backfire from the exhaust.) Also when it does this pop it seems to rewind the engine and the starter very harshly and broke 2 starters (I'm guessing as the starter is still engaged cranking the engine and it does this it forces the starter backwards or locks it damaging it.
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When I remove the fuel pump relay and crank it after a few cranks the poping blow back from the intake and the harsh stalling stops and its starts to sound and feel like a normal crank and the truck actually starts for a tinty bit and it sounds great but after it burns that fuel it dies out (obviously it has no fuel relay) so I quickly add the relay and the poping and stalling starts all over.
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Is there anything you can tell me about the fuel return? Im asuming when a car turns on it uses what needs and returns the rest somehow to the tank and it could be clogged or damaged flooding the engine causing all this popping and locking

Oh no water in oil and brand new sparkplugs after testing with no start turn black dry

 

I'm going to wait for the spark analysis before I comment.

George

 

ok I checked the spark I'm a bit puzzled I did the ark test with a screw driver at the end of each spark plug wire to chassis ground. Number one was arking but intermittenly not in a constant speed. They all really arked differently one was arking at a much faster pace.the ark was not blue but more of a yellow. I tested at the coil and the ark there was strong and rapid.
I tried pulling codes from the ecm again but it gives me nothing that also puzzles me because I've removed so many parts while trouble shooting and should have all kinds of codes 😐

 

If you still have the old distr cap, does it have carbon traces showing poor spark distribution?

How confident are you that the distr was installed correctly?

Are you sure that the plug wires are in the correct order?

What brand of ignition parts did you use?

Try cranking in the dark with a spray bottle. Mist around the distr and wires while cranking to see if there is any arcing going on.

You may have more than one problem but it sounds like the strong spark at the coil output is not making it to the plugs. It also sounds like you have some bad spark timing which may be igniting fuel during say the intake stroke. Another possibility is hydro lock from either fuel flooding or water in the cylinders preventing a complete compression stroke.

Are the plugs wet or dry and black?

Have you done a compression test on every cylinder?

There are more severe issues that can explain some of this - timing chain, bent valves, etc but you should get your ignition problem straightened out first. After that, the fuel system is a possibility but it sounds like you did a pretty thorough test of the injectors - unless they were re-installed incorrectly or got damaged. It also sounds like the regulator is working ok.

George

 

wow thank you for all your help George I really do appretiate it! I will go over all you mentioned but I have one question Is it possible with all this testing and removal of parts and cranking while map sensor and air sensor and other sensor are unplugged that when I plug my blue tooth obd2 scanner it connects to the vcm but I always get 0 codes! Is that possible? If it was the data line that was open or dirty then it wouldn't connect to the vcm but it communicates but no codes lol I'm just worndering if the computer is the culprit

 

Most codes have a rule set before they are set. The fault has to occur a certain number of times, etc. If the truck will run, look at live data on the scanner and see if the parameters make sense.

if the PCM is fried then we will likely find that out if we can’t get proper ignition function.

George

 

If the truck won’t run you can at least look at the TPS in live data while moving the accelerator pedal to see if you have communication with the PCM.

George

 

ok thanks Thats some info I did not know 😀👍
most of the brands I've been replacing are cheap duralast I know they wont last long.I like buying good brands but since I'm trying to get it running I don't want to run out of budget throwing good parts at it yet.

I'll check the TPS if it doesn't run I'll let you know my findings if it actually give me a data communication.

 

[QUOTE=GeorgeLG;718514]If you still have the old distr cap, does it have carbon traces showing poor spark distribution?

💢💢 yes i do and its really bad with lots if carbon traces💢💢

How confident are you that the distr was installed correctly?

💢💢This is my second time installing a distibutor so Ive looked up endless videos and forums so i think I learned everything including how to lay flat on the table before installing it and making sure the markings all meet because they can actually weld the top wrong.and the gear can also be out 180 if they install it incorrectly. Then once installing it I measured pressure on the piston #1 with a ballon at the spark plug hole. Once I saw the ballon filling up I kept turning the crank pulley and matched the notches on the crank shaft pulley to the timing cover. There are 2 one at top and one around 4 clock. That would put me at TDC so i then fixed the notch at the bottom of the hole where the distibutor goes (oil pump) to match the dirstibuter as i slided in with the distributer set about 25 degrees retarded so that when it sits on the engine the rotor points as close possible to the marking (6) on the distributor.then i plugged the camshaft and bolted it down.💢💢 the distributor i removed the gear at the bottom was all messed up with half teeth shaved off 😐can this have damaged the gear at the bottom the one that it meshes with??💢💢 ( i believe it's the oil crank shaft

Are you sure that the plug wires are in the correct order?

💢 I will check in the AM and report you never now with all the stress and on and off testing💢

What brand of ignition parts did you use?

💢💢Cheap brands like dupont from auto zone and other local autoparts the distributor i got online in walmart) just till turns on changing them to better quality when it starts).💢💢

Try cranking in the dark with a spray bottle. Mist around the distr and wires while cranking to see if there is any arcing going on.

💢 I'll try this asap💢

You may have more than one problem but it sounds like the strong spark at the coil output is not making it to the plugs. It also sounds like you have some bad spark timing which may be igniting fuel during say the intake stroke. Another possibility is hydro lock from either fuel flooding or water in the cylinders preventing a complete compression stroke.
💢💢 I'll recheck my distributor installation again just in case. 💢💢 I also moved the distributor with the crank pulley with no rotor on to make sure the timing belt didnt have to much play per someones trick and its seems tight as it moved in sinc.💢💢

Are the plugs wet or dry and black?
💢💢 this are brand new plugs the originals from the first time it stopped running where black dry and after all this testing they have turned dry black again so i pulled them all and cleaned them fir further testing (no sighs if wet plugs)💢💢

Have you done a compression test on every cylinder?
💢💢 no Im will get the compression hise and dial and do this test asap💢💢

There are more severe issues that can explain some of this - timing chain, bent valves, etc but you should get your ignition problem straightened out first. After that, the fuel system is a possibility but it sounds like you did a pretty thorough test of the injectors - unless they were re-installed incorrectly or got damaged. It also sounds like the regulator is working ok.
💢 yes I hope its not its my fun truck 😁 only use it like 3 times a week to pick stuff up put very little miles on it so hope its not a big engine issue 😐💢
Thanks again 😁👍

 

The carbon traces are consistent with the wacky spark results at the plug end of the ignition wires. You seem to have a spark timing issue. These engines are sensitive to ignition component brand (AC Delco is best). I don't know if that has anything to do with the worst of your ignition timing problems though. Lets get the rest of the info and then we can go from there.

George