mustang93

iTrader: (7)

I have a 98 Z28. The car cranks and tries to start. Only getting spark to 3 cylinders. And fuel to all. Fuel pressure checks out. It keeps throwing p0335 and p0336 crank position sensor code. I replaced the cam and crank sensor still the same issue. I also checked all the grounds. Anyone have these issues before??

mustang93

iTrader: (7)

Anyone?

MontecarloDrag

iTrader: (3)

Check wiring from PCM to sensors, you may have a broken wire

mustang93

iTrader: (7)

All wires are good.

dreww

iTrader: (1)

Check voltage on those sensors u replaced. Mayke sure they are getting power, ground and signal to pcm

mustang93

iTrader: (7)

Ok. I checked all grounds and 12v at the PCM. But not getting any cam sensor signal from brown pcm wire. But if I hook the test light to the positive aide and probe the wire and crank it over it back dires real loud.

dreww

iTrader: (1)

Ok, break in that wire somewhere. If u have to, hard wire a new line from pcm pinout to sensor.
I always get them confused. Cam and crank sensors. But one out will cause a no start, the other will cause a hard start with backfire, usually cold engine. I believe bad crank sensor signal is no start, bad cam sensor signal is hard start with backfire.

mustang93

iTrader: (7)

My reluctor wheel has some chewed up spots. Could that be my issue. The kicker is im pretty surebwhen I built the motor over a year ago becsuse of a broke rod it had some bad spots but I could be thinking of a different one??

joecar

The LS1 (GenIII) CKP signal has to look like this (see attached)...