Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.
Where you reading the cam retard above idle or at idle when it read -24 degrees?
Let me know so we can continue,thanks Pete.
There is a cam shaft offset procedure.The first step is to start the engine,raise the speed to 1000 rpm and see if it reads between 2 and -2 degrees.The data will not be accurate for this reading under 1000 rpm.Does it read between these readings here at all at 1000 rpm?
O.k.,usually when you are this far out of range this indicates you are off one tooth.Have you tried to adjust one tooth to see if you can get in range again.I have done this myself and was way out on range like this here with no running issues and had to pull up and rotate one tooth to then get this corrected.If this was already done let me know.
If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service,your 5 star rating is appreciated.You can rate at any time and we can continue to work on your question as this will not close out your question.Keep in mind in some cases it can be difficult to fully diagnose or help repair your vehicle without seeing it and I work on delivering the best possible answer from what I see to work with.
Sounds good.It can be tough if the oil pump shaft will not line up with the bottom of the distributor so mark the rotor where it is now so if you have to pull it out and turn the oil pump shaft with a long flat blade screw driver this way you only move just one tooth and not several.
Let me know how this turns out when your ready.
That is odd.Usually the V8 engines came with a loose clamp to turn it even on these models here.The 4.3 liter came with a fixed clamp as I ran into this issue before on those and had to replace the cam shaft once for an issue similar to this here.
You may have to contact the facility you purchased it from to see if they can find out if it was suppose to come with a fixed clamp for sure here.I dont think it should have myself.
But with it sticking at -24 no matter what after the initial engine rev to me from here since it isnt moving back down can indicate a fault with the PCM internally.The only other thing I can think of is the cam gear is worn down.
I apologize for the delay.
The only reason I would see this reading this here since it does not run poorly is a fault with the computer possibly reading the cam and crank sensors incorrectly.Since these sensors were already replaced and you know your right on with tooth alignment with timing chain and distributor I would suspect a fault with the computer.If you would like I can post the diagnostic procedure for this code for you to follow to locate and correct this here just let me know.