terry82

check vac for the motor from the intake manifold.you have replaced so many parts on this motor it should be running great.we are overlooking something.I wonder about electrical connections on cars this old.Did you replace all the plugs or just the bad one you found?

lancer013

Changed all my plug couple days ago coil within a week module for distributor within the month plug wires cap and rotor as well didnt have time to check vacon motor dont think i have a leak sprayed starting fulid around whole thing no leak or idle change from what i could hear but car runs way better without the esc wire in gotta fix a rubber hose line then can try gst the vac pressure

terry82

if motor runs better with out the computer hooked up.then your timing is off .or the computer is the problem.https://www.yourmechanic.com/article...monic-balancer If balancer is good I would suspect computer.i don't have a spare computer but I do have a spare disributer.

terry82

http://www.chevyhardcore.com/news/he...e-distributors

lancer013

Did couple of tests balancer looks ok getting about 5-10 psi vac out of each tb at rpm around 1k if i hold vac at higher rpm seems to stay steady getting 15psi at the fuel filter car my tachometer stays steady without the esc wire connected but still stumbling if i try to advance yhe distributor doesnt seem to change just by idle

derekderek

As soon as computer doesn't have control of spark, idle stabilizes. When revs jump around, does timing jump around? Either some sensor is freaking out the wcm, or ecm is bad.

Wrecked82

I vote for ecm bad, as stated before, but then, what do I know, except been there done that. New ecm is $125.00. Would you cost your time so far at $125.00?

terry82

with the computer wire connected.when you put the timing light on no one cylinder ,what happens to the timing when you rev it up ? I thought you said that you changed the ecm not long ago but do you have the factory prom?i would check vacuume from the intake manifold .

Wrecked82

Said he changed the ignition control module in the distributor. Not the ecm. Still vote for the ecm.

lancer013

I changed ecm also begin this year havent checked with timing light yet but know last time the timing was jumping a little but would stay steady when rev up will check again it has the hypertexh stage one prom

lancer013

Update 12/23/17
Checked timing its a 8degrees with esc wire disconnected tach will stay steady but at soon at i plug the back the esc wire timing jumps all over the place and tach will not stay steady made a small clip you think ecm as larry stated

terry82

the distributer is controlled by the computer.yes your computer can be the problem but,,,,,, you had replaced the computer not long ago .we want to find the problem.I would move the distributer up to 10 degrees and then plug it back into computer. see if motor improves.If not you have no choice but to replace computer .There is no way of checking the computer.the computer makes the car do a lot of strange things that you cant figure out till you replace it .If they were cheaper then everyone would just change it every time there was a hiccup.

Wrecked82

Anything new?

Wrecked82

So you got it all fixed? Did any of the suggestions help? Little feed back would be nice.

0Willcox Corvette

I hope he post back, I've been gone for a bit... just curious as to what the issue was and glad my post fired up so many replies...

Willcox

Wrecked82

I also would like to know what the problem was, if it was solved.

lancer013

Sorry guys been very busy update of car after changing the igintion module and coil the car ran fine for a day then sat for a week started it up and ran worse i think the source of the problem is the samshaft there are couple flat lopes so i think i will be rebuilding a 327 and coverting it to a carb type anyone know a good link or thhread on doin the swap

terry82

would be easy to replace the cam shaft.or it would be cheaper to rebuild the 350 .you already have it .I hope you have better luck this year.