Changed my cam gear (had broken teeth) now cant get my timing right.I set #1 cylinder to TDC on compression stroke and set distributor to #1 on the cap but still runs like crap.I've reset everything over n over to the diagram in my repair manual but can't get it right.Also have a new cam sensor.I'm lost now.It will start right up but runs like it is 180 out.What am I doing wrong?

 

Possibly something else is wrong. Bad coil low fuel pressure stretched timing chain.

 

I was thinking that the distributor only adjusts the fuel injector timing and not the ignition timing

 

Have a new cam sensor fuel pressure is good and pulled the cover last week and chain is good. I also set the timing while the chain cover was off and my cam and crankshaft marks align up. Yes JR your right about the distributor but,I had to replace the cam gear (oil pump gear)so needed to reset the distributor. It still needs to fire from #1 on the cap.

Crazy,I see you mentioned a bad coil.Would a bad coil really make it run like this? I've had them go bad on other vehicles but they wouldn't start. My truck starts right up(most times)or 3-4 cranks will start.

 

Yes it could be the coil. The coil powers the spark plugs, so if they are getting a weak spark that could cause some cylinders not to fire and run like $hit.

 

Thanx ,got a new coil coming Monday or Tuesday and will update..

 

dont know if the 92 is totally the same as the 87 but replaced my 87 3.9 6 yrs ago with crate 3.9 samething had to set it by ear couple wks back i posted where it cut off going up hill .......... long to short . changed the spark controler and wa la able to set the timming and truck runs like a new one (for now ) lol hope this helps .

 

Finally got a chance to change the coil out with a new one.No change.. Back to square 1.

 

Did the timing chain come off while the engine was running? If so you probably have a few bent valves from the pistons hitting them while they were still open. Happened on my old 1982 toyota pickup.

 

Chain never jumped.I reset timing with the cover off and marks lined up.Could someone show me a pic of a "spark controller"..