help with chevy truck

[doug schriener]

Jim-One thing ya might see with the magnets on the dist. shaft if ya look close ya could see cracks-they can disrupt the signal trying to be generated and can cause a couple different things to happen.While you're there maybe change the pickup coil.Lotsa reman motor guys won't warrantee their stuff if ya don't change that dist. shaft 'cause it can make for real weird timing fluctuations and raising hell in the cylinder.

[Jim Woods]

Ed , when I unplug the tan wire , the engine stops.

[Jim Woods]

Doug , I will check for cracks

[Jamie Greening]

Check the timing with it hooked up. Should be some where around 14 to 20 depending on calibration. If not unplug knock sensor. I've chased my tail so much because of a bad knock sensor shorted out. Does it have a lot of miles?

[Jim Woods]

Jamie, yes very high miles, whatever it is keeps getting worse, it started perfect after timing chain installed, ran about 15 sec and wont start . then it was starting but when I went to set timing it quits when tan wire is unplugged. is knock sensor tied into this system? Almost ready to put HEI and intake with a holley.( not sure if that will affect anything else

[Ed Wright]

Originally Posted by Jim Woods

Ed , when I unplug the tan wire , the engine stops.

They usually stop when the tan wire is unplugged because the timing is too slow. A second person working the throttle can usually keep it running in that case.
Hope by Holley you don't mean you put a Holley throttle body on it. :-(

[5798camaro]

try unpluging your mass air flow sensor

[Ed Wright]

Originally Posted by 5798camaro

try unpluging your mass air flow sensor

They don't have one.

[cad]

When I worked in parts at Huber Chevrolet, we used to sell a lot of distributor shafts for those and the gasket under the throttle body. Not very many injectors.
Fuel pumps are extremely common, too. Sorry if I missed anything.


Clark

[Daran Summerton]

Can you feel any air coming out the tail pipe when it's running?