suzuki-guy

Well my idle surging problem at stops and in parking lots continues!!! Ive replaced every sensor and rebuilt the heads, new fuel pressure regulator, good fuel pressure and after a year of throwing parts and money at it i decided to take it to the dealer and they told me it was a cracked magnet on the distributor shaft. I pulled it out and it was cracked in several places so i replaced it along with new ac delco plugs, wires, cap, and rotor got the timing set started it and it ran good!! took it down the road and my problem is still there!! my question is could this be my crank or possible timing chain? if so is there a way to check this? Any help appreciated i am stumped on this one ive ruled out all the things i have ran into in the past!!

mudmaniac

Hey Zuk, you have been chasing this for a good while, how many miles do you have on the motor? I hate to say give up on it, but maybe it's time for a swap.

suzuki-guy

the truck has 205,000 but it came stock with a 305 and i put a 350 in it after 70,000 miles for more power. about 5,000 miles ago i rebuilt the top end. The compression is about 140 all around. And when squirting oil in there the compression does not change which would indicate bad rings. So the bottom end and top end are good. So im not ready to swap. Not ready to give up!!!

98white5.0

So did this problem begin after you did the motor swap? Did you adjust the computer for a 350 instead of 305?

MDTAHOE

That it back to the dealer and complain they should continue to test for a reasonable price. You have to repair the known problems then keep testing. Did you move the 02 sensor back to where it should be?

suzuki-guy

no i have not moved the oxygen sensor back but i have the part and will be doing this in the morning after that if it still runs bad i have an appointment at10 at the dealer. The problem came a while after i changed it from a 305 to a 350 i did not change computers just put an aftermarket chip in it it ran good and had lots of power now.... not so much i will fill you guys in after tommorow i still think its a fuel delivery problem but i have checked ev

89silverado283

are you using the same injecters that came on the 305???? cause i know im running the 283 and im using 350 injecters and im getting to much gas.... if you are using the 305 injecters ill trade you lol i need the smaller injecters and it sounds like you might need bigger injecters...

suzuki-guy

No i just replaced the injectors and fuel pressure regulators with ones for a 350!! They are expensive 100 dollars a piece!!

89silverado283

hmm was that the hole tbi unit?? have you checked the mas air flow?? do you still got good strong compression?? maybe you need to run a hotter plug.. my truck likes hot ngks

suzuki-guy

My truck likes acdelcos!!! No mass air flow sensor on 95 started in 1996. Tbi unit was replaced with engine