I have a 92 Ramcharger originally 5.2 a518 4x4. My 5.2 failed when a lifter retainer came loose allowing those 2 lifters to rotate then the sideways rollers butchered the cam. I know, first gen, but.....
My new engine is a 94 5.9 Magnum from a 2500 pickup so I put it in the second gen forum, hope that's okay...first gen guys don't seem to know jack about Magnums.
This engine was just build by a local shop, all new internals except crank and rods pretty much. Stock bottom end, new EQ 2.02 heads, new Hughes cam HER0814ALN w/ matched springs and locks, Hughes plenum pan, cut 1/2" off kegger runners and smoothed casting, crappy Pacesetter shorty headers (cuz I already had them).
I'm using all the 5.2 PCM, harness throttle body and sensors but the 25lb 5.9 injectors.
First start up went very poorly, ran very rough and kept dying, would not idle.
Following night I pulled dist and saw intermediate shaft was off 1 tooth, corrected that. I'm not sure which way the distributor's tang belongs in the slot on the intermediate shaft, or how to tell its not 180* off, so I stabbed it in with the pigtail of the sync sensor to the rear with the sensor's marking eyeballed inline under the rotor tip.
It fired up and idled smooth for about a min, then stumbled and died. Took some pedal to restart, and occasionally some pedal to prevent it from dying again. I ran it at 1500rpm to bring it to temp and it ran smooth and sounded good except for a sputter now and then, then at idle it died. After a few restarts it would idle rough sometimes and just die others but mostly sounded fine revved above 1000.
I'm hearing impaired and have trouble identifying engine sounds especially over open headers, not sure if it was backfiring or not. I still have to spread the collector pipes to fit the headers.
I had no engine management problems before doing basically just a longblock swap so I'm thinking it must be an incompatibility between the 5.9/cam swap and 5.2 PCM.
Biggest question: Assuming that the 5.2 PCM is incompatible, would an OBD 1 5.9 PCM and required changes solve that problem?
Any input is appreciated, thank you.
My new engine is a 94 5.9 Magnum from a 2500 pickup so I put it in the second gen forum, hope that's okay...first gen guys don't seem to know jack about Magnums.
This engine was just build by a local shop, all new internals except crank and rods pretty much. Stock bottom end, new EQ 2.02 heads, new Hughes cam HER0814ALN w/ matched springs and locks, Hughes plenum pan, cut 1/2" off kegger runners and smoothed casting, crappy Pacesetter shorty headers (cuz I already had them).
I'm using all the 5.2 PCM, harness throttle body and sensors but the 25lb 5.9 injectors.
First start up went very poorly, ran very rough and kept dying, would not idle.
Following night I pulled dist and saw intermediate shaft was off 1 tooth, corrected that. I'm not sure which way the distributor's tang belongs in the slot on the intermediate shaft, or how to tell its not 180* off, so I stabbed it in with the pigtail of the sync sensor to the rear with the sensor's marking eyeballed inline under the rotor tip.
It fired up and idled smooth for about a min, then stumbled and died. Took some pedal to restart, and occasionally some pedal to prevent it from dying again. I ran it at 1500rpm to bring it to temp and it ran smooth and sounded good except for a sputter now and then, then at idle it died. After a few restarts it would idle rough sometimes and just die others but mostly sounded fine revved above 1000.
I'm hearing impaired and have trouble identifying engine sounds especially over open headers, not sure if it was backfiring or not. I still have to spread the collector pipes to fit the headers.
I had no engine management problems before doing basically just a longblock swap so I'm thinking it must be an incompatibility between the 5.9/cam swap and 5.2 PCM.
Biggest question: Assuming that the 5.2 PCM is incompatible, would an OBD 1 5.9 PCM and required changes solve that problem?
Any input is appreciated, thank you.