I have been living with this issue for a while now, but I am finally fed up with it.

I have a vortech super charger with an ATI intercooler. Over the last couple years, I have been throwing a code 33. I can be barely in the throttle and the car acts like I just shut off the spark. If I keep the throttle in that place, the ses light comes on. If I get out of the throttle at that time and get back into it, no light and the car responds. I can also stab the throttle when this happens and it responds fine with no light. It appears that this occurs only under 2000 rpm's and it does not matter if it is hot or cold; open or closed loop.

I have read about the factory setting for setting a code for excessive air flow under 2000 rpm's. Could this be the issue?

I have an OTC 2000 scanner. If I hook it up and watch the MAF readings, what am I looking for when this occurs?

I have swapped MAF's and relays to no avail.
Any suggestions would be great!

 

have you tried to adjust your TPS?

 

I have checked the TPS and it is set to factory specs. Should I deviate from those settings? Let me know your thoughts.

 

Adjusting the TPS is kind of a band aid fix to the problem. If you set it on the low end (like .35) it should come close to fixing it, if not fixing it.
Yes, need to change the chip. Its probably set at 45 gm/s and thats usually too low... even on just a cammed car.

 

No luck, I set the tps to .32 and it seemed to work well on the low end, 45 mph and less but on the high end, it fell all over itself again.

Any more thoughts? I will entertain burning my own prom as a last resort.

Thank you!

 

Switch to '749.

-- Joe

 

A step ahead of ya, I found two 7749 ecm's in the salvage yard, the map and plug are on the way. I found the prom part number, but am looking for a speed density vortech 350 chip for ease of use.
I am ordering the knock sensor today.
see ya,
Mark

 

Joe did you ditch the 730' that you converted to run the $58?

If you did just curious why?

 

I'm running $58 (actually $60 now) in my '730 btw. no need to actually get a '749.

As far as running the modified version of $8d, no i'm not running that anymore.

-- Joe