Grn4fbody

iTrader: (2)

So I go to put my car all together tonight(Me & Dlove) get it all together, clip everything...check everything twice. Turn it over and she just cranks....no fire what so ever.

First thing I do is check the shrater valve for fuel at the rail....Check

Then he thinks maybe the pushrods are to long since it's showing no vacuum as he's logging...pull the valve cover, looks good! The throw a compression gauge on it and it has compression! But we noticed the plugs are dry....bone dry. So I crank it over and he notices the PCM show's theres no spark or fuel. We check all the grounds, all is good, check fuses...everything's good.

We end up even replacing the Cam & Crank Positioning sensor's...STILL NO FIRE.

Anyone else ran into this problem?

jay_lt4

iTrader: (4)

what did you change, or what is the new parts combo?

Grn4fbody

iTrader: (2)

Cam, on stop 241 heads,stock compression,7.450 Pushrods, bolt on's

Cam specs are 231 Duration 617 Lift both sides

98Camarod

iTrader: (43)

Have you tried your ignition relay? That happened to me after my install.

jay_lt4

iTrader: (4)

ya, check all your fuses and relays,, check for b+ at your injectors while your key is in the run and crank positions

Grn4fbody

iTrader: (2)

Yeah Checked all the Relay's & Fuses

jay_lt4

iTrader: (4)

do you have power at the injectors,

Grn4fbody

iTrader: (2)

We didn't check, Ill check that today. Will the injector's have power with key on?

jay_lt4

iTrader: (4)

yes key in run and crank positions one of the terminals at each injector should have b+ voltage

Johnv

Check that you have connected the MAP sensor at the back of the manifold.

Grn4fbody

iTrader: (2)

It's there.


Could of when he flashed the PCM it fried it?

jay_lt4

iTrader: (4)

you never said anything about re-programming your pcm, yes it could have if you lost communication or the file you flashed was corrupt

get a scan tool on there and see if you have any data,

Grn4fbody

iTrader: (2)

Yes it dose, we re-flashed it with a stock tune yesterday and no help

98Camarod

iTrader: (43)

How did you check to see if the relay was good? swap the fan and ignition relay and give it a try.

Grn4fbody

iTrader: (2)

We swapped the Starter & Ignition relay

jay_lt4

iTrader: (4)

you never did answer if you have power at your injectors??

Grn4fbody

iTrader: (2)

I don't have a DOM or a volt meter, all I have is a test light.


If my PCM is bad, can I use any 99-02 Fbody PCM's?

Tonight I'm gonna try to unplug my buddy's 04 GTO PCM and plug mine in and see if his car fires with my PCM....I'd really like to try this on a Fbody but I wasnt sure if I can do this on anything besides an 02 M6 car?

jay_lt4

iTrader: (4)

??? is your test light broken,, thats what i would use to check for power at the injectors

dlove

iTrader: (23)

Never use a test light on a PCM circuit.

jay_lt4

iTrader: (4)

lol your funny,,, you can use a test light to check for power at the injectors, the power circuit does not go through the pcm,, it comes from the fuse block straight to the injectors

the pcm controls the ground circuit and i wouldnt recomend a test light on that circuit, but for the power circuit your fine

now if said to check for injector pulse id tell ya to use a noid light