Sexy stroker turned into Bucking Bronco...

[Mgardiner1]

Its dark out now (not that ever stopped me before....) but i will try



ok i'll brb.... LOL

EDIT: also wanted to add, i rolled the engine up to TDC, popped the dizzy top, and the rotor was dead centered on the #1 electrode. I know other people with aftermarket cams have had to index the distributor, and i can't remember where the ideal position was, the leading/middle/trailing edge of the rotor.

[Mgardiner1]

hmmmmm let me tell you how frustrating it is to try and test the male side of a round pin connector! I could not find a resistance lower then 380 ohm. I'll search locally for a new sensor tomorrow.... Thanks for the alldata info dave

[dwg86]

Send me a PM with your email so I can send the links with pics on the crank pos sensor check, and the cam pos sensor install.

[Mgardiner1]

Dave thanks for the e-mails. I would not say my distributor is indexed perfectly, but relatively close. I'm not really sure how the index of the distributor being a few degrees off would create this problem (especially knowing it seems to be effected by heat)

Needless to say, if i locate a CPS tomorrow and try installing it with ill results, i'll cut the ears and rotate the dizzy

[dwg86]

I sent you the distributor link because in your earlier post you said "I know other people with aftermarket cams have had to index the distributor, and i can't remember where the ideal position was, the leading/middle/trailing edge of the rotor". So I thought the distributor link might help. I hope you get it figured out. I know if it was my jeep I might want to it up!

[Mgardiner1]

With the timing mark on the the damper lined up on zero at TDC, it sounds/reads like the trailing edge of the rotor should be lined up with the furthest edge of the electrode. I guess this is to offset any advance of timing that will happen (as i don't think any ECU retards timing, except potentially during cranking). I know the newer jeeps with coil packs are known to be real picky if the cam position sensor is detected "out of sync", i just don't think my OBD 1 ECU is advanced enough to know the difference in a few degrees of timing on the dizzy. However, since i have no other logical explanation, other then replacing sensors (i HATE HATE HATE changing parts, i am NOT a parts changer, i'm a MECHANIC), its worth a stab at it, and costs me nothing.

[Mgardiner1]

Problem solved.

I threw a CPS sensor at it today, and this time i was not surprised when the problem re-occoured. So i scribed the distributor, followed Dave's e-mail to a "T" for indexing the distributor (after cutting the ears off). Reconnected everything, and when i turned the key i heard an immediate difference, it was not missing or "caming" at an idle. I tested it, went for some gas, drove it around the block, tach'd it out a few times, and it NEVER missed a beat.....

Now has anybody ever seen a stock indexed distributor cause this kind of problem before?

[SilverXJ]

I think me and others in this thread had assumed that your distributor was already indexed correctly and that we were looking for component failures.

Glad you got it running right. I know how it is to have something that doesn't work as intended.

[Mgardiner1]

Chris i never would have suspected it, as the distributor worked fine in its stock location for 400 miles. I had also mentioned once before in some thread, somwhere, lost forever LOL that i did not need to index my distributor and it ran fine, and contributed that to the "Mopar" brand cam. However, i was clearly not right. It was a good 15-20 deg's off, which works out to 30-40 crank degrees off. I think the crank and cam position sensor confused the ECU in which cylinder was up next and briefly cut the coil and fuel until it could re-sync

[dwg86]

WOO-HOO!!! New rear, new engine...hopefully now you can go and enjoy the stroker!!!

[Sighman]

WOW, I'm glad to hear you got it running again. I will have to remember this when I finally put mine all back together!

[Flash]

Glad that you jeep can fill love again

Now you can look forward to finishing braking in the motor.


Flash.

[Heck]

I'm sure glad you fixed this. Mine has started doing the exact same thing, right at 3000 rpm. Mine is an '03 with coil-on-plug and the cut-off-distributor type cam sensor and, even though I indexed it carefully, apparently it's wrong. Am I correct in assuming that a dealer tech can synchronize the cam and crank with his electronic wonder window?

[Mgardiner1]

I'll search for the article on how to time it, it was posted here not long ago. Apparently rolling the engine up to TDC and using a tooth pick to align the cam sensor through the locator hole is the way to go

[SilverXJ]

I'll search for the article on how to time it, it was posted here not long ago. Apparently rolling the engine up to TDC and using a tooth pick to align the cam sensor through the locator hole is the way to go

http://motorage.search-autoparts.com/mo ... rticle.pdf

If you follow that and do it carefully you shouldn't have a problem. Its pretty easy.. TDC, insert tooth pick, stab it with the plug toward the rear, tighten down, and remove toothpick.