Code 33 on an '86

[Vetman]

Need some advice here.

Recently, after about 2 hours of cruisin', my engine stalled at a stop light. Picked up a service engine soon light.

At home, I checked the computer and received a Code 34. I replaced the MAF sensor and burn-off relay. Now, I'm O.K. until I came back up to about 180 degrees at which point the engine starts to stall, then speeds up, then dies. I picked up a service engine soon light again, and now get a code 33. Since the service manual is about as clear as mud on a code 33, I decided to get some "professional" help.

I took the car to the local Chevy dealer (who claimed to have a "Corvette Specialist")who told me, "I think we need to start by replacing the fuel injectors. Your injectors are dumping too much fuel. After we replace the injectors, we'll go from there." I told the mechanic, if he wasn't sure what the diagnosis was to forget it. I'm not going to replace parts "looking" for a fix. (He wanted $1,400 to replace the injectors) I drove the car home with erratic revs and a backfire or two.

Any ideas, suggestions, or great thoughts? Do I take it to another Chevy dealer, or drop back 10 yards and punt?

 

[Ken]

Check this out for code info: 1984 to 1991 Corvette ECM Codes

"I think we need to start by replacing the fuel injectors. Your injectors are dumping too much fuel. After we replace the injectors, we'll go from there."

...at which point the engine starts to stall, then speeds up, then dies.

:confused

Sounds tho' like something I went thru when my cats failed.

 

[Jim]

Your so called (Corvette Specialest) isn't one that's for sure! and $1400 for injectors is a ripoff!!!!!! if it were injectors dumping to much fuel you would also get a 45 that's for sure! and mayne a 31 also. A code 33 is your MAF or your MAP, BUT a code 33 can be set by a mis-firing engine of which you have. If your car is backfiring which most cases is timing, I would take to a good shop in your area (not the dealer), Any good Mech knows OBD systems in and out and being a corvette doesn't matter. A quick check of those two sensors and your timing will isolate the problem ( could be timing chain) hope this helps. Jim