Pro-M \'popping\'

I have a new 306, Cobra Intake, MAC CAI, with AFR heads, BBK headers & Magnaflow exhaust, TF Stage 1 cam, 24lb inj, with a compression of 9.5:1. I had the car tuned with an Autologic chip and stock GT MAF (19lb inj), but the car would always 'die' at a light or exiting the freeway, probably due to the stock MAF being set for 19lbs. I switched to ProM's 76mm which solved the 'die'-ing issue, but now the car shudders or 'pops' around 2000-2200 rpm (according to ProM's website, this is caused by an air leak in the CAI, or a loose PCV valve). I checked everything in their troubleshooting list, but my car continues with the 'popping'. Anyone run into this problem with ProM MAF's? I'm trying to purchase a used stock Cobra MAF to see if that will remedy the problem. Any other suggestions?

Is the MAF configured for 19lb or 24 lb injectors?

Personal opinion: Pro-M started the whole after market meter thing many years before anyone else got into the market. They have a great (if expensive) reputation. C&L, again in my opinion, is a great low cost alternative, if you can't or don't want to spend the money for a Pro-M solution.

I do know that Pro-M now markets a low cost version of their product, but if you are talking about their top line meter...and you purchased the correct calibration...I seriously would doubt if the metere is at fault. Stranger things have happened...substitution is a great diagnostic test...give it a try, then check your fuel pressure, fuel volume...especially since you are sure there isn't or you haven't discovered any vacuum leaks.

<font size=-1>[ This Message was edited by: Beoweolf on 11/4/04 4:29am ]</font>

Yes, the ProM is configured for 24lbs. Unfortunately, I discarded the stock MAF once the ProM was installed and resolved the 'die'-ing issue. I figured I was home free, but I was obviously incorrect (and from what I've heard, you need the stock electronics/MAF in order to use C&amp;L, or am I wrong?) Hopefully, once I can get my hands on a stock Cobra MAF, that will resolve the issue.

<TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font size=-1>Quote:</font><HR></TD></TR><TR><TD><FONT SIZE=-1><BLOCKQUOTE>Hopefully, once I can get my hands on a stock Cobra MAF, that will resolve the issue.</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR></TD></TR></TABLE>

The Cobra MAF and EEC are calibrated differently than the std units. Everything I have read about them say they can only be used together.

[addsig]

Where is the MAF located at? Is it still in the stock location or is it in the fender well?