4.6 stroker problems.

[Frank Z]

. Since you are not getting a CEL it's gonna be hard to troubleshoot.

Ahem....

got a P1391 code intermittent loss of CMP or CKP.

 

[userbmx1315]

i checked my fuel pressure and its reading 44.5
after i shut it off it goes down and keeps droping.
when i rev it up it stayes about 44-46psi

i have replaced the CMP and CKP and it didnt change anything.

 

[Frank Z]

You're check valve is leaking back to the tank or you've got an injector leaking.

 

[userbmx1315]

ive changed injectors. would the check valve be causing my backfire?

 

[Frank Z]

Nope.

 

[userbmx1315]

i have no clue what wrong with it. this weekend i'm going to pull it and take it apart to see if it'll run better.

 

[jeeperjohn]

Ahem....

my bad :doh:

 

[Frank Z]

Baliff!...Wack his PeePee!!

Dude, seriously...index the dizzy again. It won't cost you a single penny. While you're at it, pull all the plug wires and quadrupple check the firing order.

 

[userbmx1315]

i'll check it again. i'm not trying to be ignorant just dont know what happend to it.
its hell using others cars.

 

[userbmx1315]

redid my timing once again. the first time i was off. the second time it cranked, but still acted the same. got a new code

P0320
ignition/distributor engine speed input circuit.

not sure what that means

 

[userbmx1315]

i was told that my timing was supposed to change due to my after market cam.

 

[Frank Z]

Nope, that's not true....wait.

Did you advance or retard the cam?

 

[Frank Z]

What timing chain set did you use?

 

[userbmx1315]

i put the cam at stock. lined up the marks. oem timing chain.

 

[Frank Z]

I went and looked at some of your earlier threads. Is this the Renix Stroker that you mentioned?

 

[userbmx1315]

no its a 98. its a 95 block. 98 head. .040 over 99+intake

 

[Frank Z]

95 motor in 98 XJ, Check.

What flexplate did you use? 95 or 98?
What sensors did you use? 95 or 98?

P320:
P0320 (M)No Crank Reference Signal at PCMNo reference signal (crankshaft position sensor) detected during engine cranking.P0320 (M)No RPM Signal to PCM (Crankshaft Position Sensor Signal to JTEC)A CKP signal has not been detected at the PCM.

 

[userbmx1315]

its just a 95 block. everything else is 98. stock flex plate and sensors

 

[Frank Z]

How does the distributor gear look?

If it were mine:
I'd inspect all of the wiring associated with the cam and crank sensors.
Get another set of eyes on the distributor.
Swap in a known good PCM
If none of these worked I pull the timing chain cover and verify the timing marks on the cam and crank gears.

 

[userbmx1315]

i've checked the pcm got a buddys pcm out of his 96 to check mine. no luck. ive checked the wiring and had my father sert the timing once.