check engine flashing

[great white]

Step 1: see what codes are stored it the PCM......

 

[bluex]

i dont drive it much iv only put 10,000 on it in 2 years

When you did your tune up what brand parts did you use for the cap, rotor, wires an plugs?

Get the codes pulled for sure before buying parts....

 

[96liftedchevy]

i checked the codes today and there were 2 147,157

 

[phule]

Both are secondary o2 sensor codes most likely why the light to flash. Du you still have your cats? Check to make sure your 02s are still connected. Any recent maintance performaned on the truck? Couple quick checks from a tootle search.

Air leaks in exhaust in front of o2 sensor giving false reading Engine running excessively lean O2 sensor connector damaged/corroded O2 sensor signal circuit is shorted to ground O2 sensor ground circuit is open O2 sensor has failed (it may be contaminated with fuel or coolant)

Sent from a wannabe ipad

 

[great white]

Hmmm, those codes don't seem very consistent with the problems you're having.

One is Heated O2 circuit and the other is related to catalytic converter efficiency....

 

[96liftedchevy]

I still have my cats they are new and I replaced the o2 sensors two years ago the check engine light always stays on because there is a bad ground I think on bank 2 that is bad I think that's what my mechanic told me but the are working the flashing light is something new I was hoping when I read the codes there would be a new one in there that I didn't know about but just the same two

 

[great white]

So, is a shop working on it or are you?

If you're doing it yourself, I'd pop the distributor cap off next and have a look at the posts, button and the rotor, then meter the wires....if it's in a shop, they are most likely way past that point and much deeper into it....

 

[bluex]

If you used cheaper parts store brand on the cap rotor an wires they are probably junk by now. Id start there personally.

I used this tune up kit here. If you price all the AC delco components separately this kit is about the same price. The cap has brass terminals an the wires are prefect fit an have super low resistance....

Scroll down to the firepower ignition kit...

http://www.performancedistributors.com/vortec.htm

I used the over the valve cover wire set.

 

[96liftedchevy]

i have a buddy that works on the truck hes out of town so im just trying to get some ideas i will look a the distributor cap thank you all for the help this is a great site and has the best people on here