lately my car has been bucking like hell if i give it too much gas.... at first it was stuttering, and bucking at high rpms... say second gear at 5k-7k rpms... now it does it anytime i floor it...say downshifting from 3rd to 2nd and gunning it...it will just buck like crazy until i ease off the gas, then it runs like a bat out of hell... at one time i had code 1391 i think...it was the cam sensor...ive tried two different ones and it didnt change anything... i looked at the wiring harness and no wires were melted.... anyone ever had this problem...i did a search and it seemed everyone else had a timing problem... i do have crane 14 cams, aem gears(remarked), and im turbo....but i doubt the timing would of actually (jumped) because the car runs good anywhere else and idles decent... what am i missing?
doug

Sounds like it could be that the cam gears need to be tuned. What are the cam gears set at now?

Originally posted by powellds
Sounds like it could be that the cam gears need to be tuned. What are the cam gears set at now?

:wary



You have access to a logger? You may not be throwing a CEL for it but it almost sounds MAP related. Check it's voltages.

Make sure the plug is secure in its socket. Mine did that, and it was because the plug was rocking in the socket when the engine would torque on its mounts.

mine was doing the same exact thing. the wires were having a problem staying connected i guess. i had no CEL at first so i couldnt figure it out, but i fianlly got one for CAS connection...i cut and re-wired a new pigtail in and it fixed her right up

good luck

lets see...so far ive gotten a new cam sensor, re wired a new pigtail, checked for any shorts, checked voltages to the cam sensor and crank sensor....everything looks like it should be...but its still doing it..... i do have a logger...but it works when it wants too...(im a 95)...thats how i knew it was 1391...also, i did try changing map sensors....anyone else?
doug

Originally posted by lickscissors
lets see...so far ive gotten a new cam sensor, re wired a new pigtail, checked for any shorts, checked voltages to the cam sensor and crank sensor....everything looks like it should be...but its still doing it..... i do have a logger...but it works when it wants too...(im a 95)...thats how i knew it was 1391...also, i did try changing map sensors....anyone else? doug

like i said, i had the same exact problem my friend.

p1391 is CKP or CMP connection. cmp being cam sensor, and ckp being crank. any short or discrepency in the wiring here will cause you much grief. check both sensors.

well alrighty...ill give the crank sensor a shot...i just didnt have one to try out...i did test the leads to it though...ill let you know what i find out
doug