2006 pontiac grand prix gt 3.8 supercharged
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05-03-2015
2006 pontiac grand prix gt 3.8 supercharged
05-03-2015
New long block engine. ..new plugs wires and coil packs and module they sit on.cant find the problem need help in a bad way.
05-03-2015
MAF sensor? Is it shifting hard at all? Any engine codes? Running a Cold air intake?
05-03-2015
It had a code for #3 cylinder misfire..shifts good.i got a long cone shape spectre air filter
05-03-2015
A guy at a shop said the #3 cylinder was almost dead so I bought a new long block.and it still has the same problem. .
05-03-2015
It starts sputtering when the supercharger starts to whine and the engine light flashes suggesting a engine misfire. But that's what I don't understand all that is new
05-03-2015
Was old motor compression checked? Might want to check new motor also. Parts stores rent sell for $25.
05-03-2015
So you had a misfire, and bought a whole new engine? That's way overkill.
When the Service Engine Soon light flashes, that indicates a misfire. Misfires aren't caused by Spark only (Spark Plugs, Plug Wires, Coil Packs, ICM), it can also be fuel related. Scan the code and see which cylinder is misfiring, then try swapping injectors and see if the misfire follows.
05-03-2015
No I had a hole in my number 3 piston.i had to replace for what I paid for the long block I couldn't beat it
05-03-2015
Anyways, trying doing what I stated.
Misfires can be causes by Spark or a Fuel related issue.
05-03-2015
Ya they done a compression check on the old engine and the number 3 wouldn't hold pressure. The sputtering existed before the new engine.but all the plugs wires coil packs and module the coil packs sit on.
05-03-2015
I'll try ecm tomarrow that's about all I haven't changed with electrical
05-03-2015
You arent helping us here, you wouldnt walk into a shop and say "hey, my car don't run. Can you fix??? Here are the keys and call me later, thank brah
We need to know other things too.
What brand plugs, what gap. What kind of fuel you run. New factory coils and ignition control module?
Why hasnt this shop even done testing yet. Why arent they looking on the scanner to figure out if you have an injector dying off, or if you have a voltage issue. They should be swappng plugs around, moving injectors around, moving wires around. Pulling ack the harness to figure out if something is wrong here.
My last ditch effort would be to replace the PCM.
05-04-2015
I didn't ask anyone to fix I'm looking for suggestions to solve the problem...everything is ac Delco. Injectors are factory replacement. ..engine is new.so it's something that I haven't replaced yet
05-04-2015
Everything I put on is good just looking for suggestions on what else it could be.theres not much left to change..I just don't wanna spend 300 on a part and it keep doing it..and I'm afraid if I drive it I'm gonna end up with another hole 8n the piston
05-04-2015
clogged cat will also cause the cel to flash.
05-04-2015
Cat and resonator are both gone.just mufflers on it
05-04-2015
start testing injector wires to make sure the injectors are firing, #3 would be where id start.
exactly what code are you getting?
05-04-2015
I been fooling with this thing for a month...lol I'm about to set it on fire lol its become quite the headache
05-04-2015
I was getting a multiple misfire code.and before I changed motors the number 3 compression was way below the rest.im gonna drive it to work in the morning and have it put on computer again when I get off work
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