97 Z71 misfires

Check for intake leak.

Alan

Doesn't this year of Vortec have individual coils per cylinder like the newer ones? Have you tried switching coils around and see if the miss changes?

Nope, I got one myself. Distributor, 8 wires etc.

No.

Plugged injectors. Exhaust valves not opening.

Is that 125 on all cylinders or just those two as it is a bit low. Also have you done a wet and dry compression check on them? (with oil squirted in cylinder for wet test) Might check crank posotion sensor as it provides a timing referance and also the magnet pickup coil in distributor (they call it a cam position sensor now but it is still basically the same thing but the new name sounds more hightech). Might do a fuel pressure check to see if it is fuel starving a bit too and change fuel filter if it has not been done yet.

----------------- TheSnoMan.com

For what seems like the 4000th time, it is not the same thing and has nothing to do with the function that the previously used distributor pick-up coils did. Cylinder identification only so the injectors can be fired in sequence (or 'sequins' in your book).

You must get your rocks off sending people on wild goose chases.

I guess you cannot follow the posters request huh, you are a real troll!. BTW, you can call it a CPS till cows come home if it makes you happy but you need to focus more on helping and less on being a arse and getting you ducks in a row too.

----------------- TheSnoMan.com

You should know because you quack or honk more than anyone

----------------- TheSnoMan.com

BTW, if you knew half of what you claim you would know that while the CPS does not normally cause timing problems it does provide a 1 X signal to VCM (crank position sensor provides a 4x signal on V8's and

----------------- TheSnoMan.com

Actually the CMP is a .5 (1/2) X signal, if you follow GM convention of pulses per CRANK revolution.

VCM = Vehicle Computer Module, correct?

Toyota MDT in MO

Snofraud, he already knows that it is misfiring on cylinders 5 and 6 (IOWs, the cam position sensor is doing its job). So, other than some overwhelming desire to be exceedingly obtuse, what's your point?

You owe me a keyboard!

I'm under no obligation.

Correcting your errors does not make me a troll.

Would "getting my ducks in a row" mean correctly identifying a component and its function in the system?

What kindergartner gave you that one?

Read what I wrote Snobozo.

I never said the cam position sensor was "out of the loop." I merely refuted your assertion that it functions and performs the same as an HEI pick-up coil. It doesn't, no matter how much you want to believe it does.

It is reflective of his highest level of education.

Typical Troll answer when he is caught with his pants down.

----------------- TheSnoMan.com

And Trolls sometimes travel in groups too.

----------------- TheSnoMan.com