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i had a similar problem on my jimmy,replaced just about everything it could possibly be (drove me crazy for 2 years) I pulled my distibutor and the gear looked fine,but the top bearing was dragging.I replaced it and it runs like a new truck. All that time and money .i would have never even guessed what it turned out to be.mine was throwing that p0300 and once in awhile p0301. I even bought a scanner with live data.i even thought it was the trans for awhile.I would recheck the distibutor. sorry for he long reply but i know what your going threw.
oh, no don't worry about the length. I am welcome to any and all replies, especially longer ones that go into depth of how it relates to my problem, like you did. Thanks a lot. I appreciate it. I will be pulling out my distributor this weekend.
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i had a similar problem on my jimmy,replaced just about everything it could possibly be (drove me crazy for 2 years) I pulled my distibutor and the gear looked fine,but the top bearing was dragging.I replaced it and it runs like a new truck. All that time and money .i would have never even guessed what it turned out to be.mine was throwing that p0300 and once in awhile p0301. I even bought a scanner with live data.i even thought it was the trans for awhile.I would recheck the distibutor. sorry for he long reply but i know what your going threw.
brother, you're truck sounds like a carbon copy of the crap my '98 has been throwing out since Feb/Mar of this year. distributor looked fine when pulled, and i was convinced it was an electrical issue, not the lower intake gaskets 'til a couple of weeks ago.
i noticed that the tach wasn't dropping RPM's, it was raising RPM's (like a slipping trany perhaps?), and it feels like the lockup on the TC was engaging/disengaging rapidly, causing the "jerkyness" i experience (especially at start off, worse @ cold engine temps).
since i figured this was the trans on it's way out, i was content to just let it blow-figured it was gonna drop around the 21st of January next year........you know, the day it drops down to -40 degree weather.
since you mention pretty much the same issues, and that was your solution, i think i'll drop the $112 for a new distributor-'cause i sure as hell ain't gonna swap in the used spare i have after reading your reply.
thanks for the info and personal experience.
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'70 Dodge Dart 340 Swinger, 4spd, 468 RWHP 383, w/3.91's
'78 Chevy Silverado LWB, slammed (sold)
'79 Buick LeSabre 4dr, w/Olds 350 Rocket (1st ride)
'84 T10 Blazer w/8" of lift (sold)
'90 GMC Suburban SLT, a Canadian rust bucket (R.I.P.)
'90 Chevy Suburban Silverado, 6.2 diesel, a Southern Belle
'92 T15 Jimmy SLT, 4dr, 4WD, 1 of only 2 factory 5spds. in Canada, and stupid fast (R.I.P.)
'95 Buick Regal LS, 172K, still going strong
'96 Jetta GL 4dr, diesel
'98 T10 Blazer LT, 4dr-current head ache!
