Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hi Im David, thanks for visiting the site. What are the fault codes?
no problem, thanks
yes im here, please have a little patience
try adjusting the distributor. I have attached the complete diagnostic for the code, but adjusting the dizzy would be the first thing I would try.
try advancing yes
Ill be here
this is a failure of the cam and crank sensor working together. a scan tool is going to need to be used to troubleshoot this to see what sensor is reading offset from the other.
I never like to replace anything until I know its bad.
its definitely a hard fault for sure. maf sensor has no input to the code whatsoever
it doesnt matter what scan tool you use, the code is the code. it needs to be diagnosed accordingly.
if you want to take your chances by replacing both sensors, have at it. but I would check the power, ground and signal at the sensors.
ok, please give me a while to get those tests together for you. thanks.
crank sensor test
cam and crank schematic for reference
more info for you.
ok, if you follow that information, you will determine if its a wiring issue or a component issue for sure.
please accept the answer and leave a 5 star rating for me if you are satisfied with my assistance. just remember, by accepting the answer and leaving a rating doesnt mean we are done. im here to help you until the vehicle is fixed.
thank you much and let me know if theres any more information or assistance that you need.
the lower intake manifold gasket wasnt replaced?
spray around the intake manifold and plenum, all vacuum hoses and connections and the brake booster with carb cleaner and check for an rpm change
not with carb cleaner
if the maf was faulty it would code. but you can test it.
hows it going?
are you talking about checking the signal from the maf?
just use the voltage to check the signal by back probing the connector while cranking the engine
yes you should get a dc voltage reading
well that tests good.
is it still taking a long time to start?
how about doing a fuel pressure leak down test
fuel pressure test and leak down test,