Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Do you have a digital volt meter and a good test light to do some testing?
About what time do you think you will be able to go back to the truck? Will you have internet access so we can work step by step to solve this problem?
When you are ready just drop me a line right here on this string and I will get back to you asap.
We can test the coil and see if it is getting a signal.
Please give me a couple of min to see what all you will need to do the correct this problem.
I am sorry but for some reason the site lost your string and I was not able to repost back to you. Do you have a test light, timing light and a digital volt meter? I know the timing is not adjustable by much, but this code is not for a bad cam sensor, but that the cam and crank sensor are not timed correctly so they are not in sync with each other.
Do you have a scanner that will give you live data ? If you do or can barrow one you will not need a timing light.
Can you use it to tell me what the advance is with the engine at 1000 rpms please
How long did you hold it at 1000 rpms and did the advance fluctuate?
Did it stay at 21 the whole time it was set back to stock? What brand and model programmer do you have?
Can you try this for me, Loosen the distributor hold down bolt and turn the distributor clockwize about 8 degrees and see where the advance is please.
I need you to do one more thing for me please. I need you to find the timing line on the harmonic balancer and measure the circumfrance then I need you to pull the cap back off, rotate the engine by hand two full turns clockwize till you have a the timing line where you can see it and mark a place on the timing cover. Then mark the location of the rotor button. Then I need you to turn the ballancer counter clockwize till the rotor button just starts to turn. Mark the timing cover again where the timing line stops and measure the dsitance between the two marks on the timing cover. This will tell me if there is any slack in the timing chain, and how much.
I am sorry I did not know that you had just put this engine in. You can disregard the last post then. Did you have cylinder 1 on a compression stroke?
Can you bring cylinder number 1 back up on a compression stroke, and line the ballancer marks up as shown in the diagram below, pull the distributor out and line the marks up as shown below. There are two dots you can use on the shaft and gear. then make sure the rotor button lines up as it is shown below in figure marked 2.
When you drop the distributor back in the flat spot on the distributor base will line up with the back of the intake.
The rotor button should turn clockwize and line up about where the corner of the flat spot is to the right.
Let me know how it goes, and how it runs afterwards. Please leave your tune on a stock setting till we find and correct this problem please.