**By reseting the eec you mean disconnect the battery? Yes I did that.I just took it out for a drive,it really runs like *****.Even when normal cruising,it bucks and hesitates.WTF?5.0Droptop said:Did you reset the eec after you instaled the new maf?
It would surge once in a while,it wasnt constant.It ran mint before.When I started (Totally cold,overnight) it up it would go to 1800rpm for a moment,then go back down to 1100 for about 25 seconds then down to idle.Now it goes up to 1800,and rite down to zero!! And when driving it,it hesitates,and I dont feel any power increase,it was the stock mafbmo37 said:first u stated there was a surge before the install and your next post you state the car ran great before the install which is it. A few questions is the maf new, is it calibrated for your injectors? if its not new try cleaning the sensor wires with electrical circuit cleaner to remove oil and dirt from sensor, did you try rotating the sensor (if you have a fender mout cold air kit or any bend in front of the meter than you air path may be directed other than straight on, try disconnecting the battery for 20mins and letting your cars computer reset.
if none of that stuff works you might of had a problem before you installed the maf and its installation made the problem worse, check for vaccum leaks on the tree, tubing and near the manifold. Another culprit is the iac sensor.
willys1 said:It would surge once in a while,it wasnt constant.It ran mint before.When I started (Totally cold,overnight) it up it would go to 1800rpm for a moment,then go back down to 1100 for about 25 seconds then down to idle.Now it goes up to 1800,and rite down to zero!! And when driving it,it hesitates,and I dont feel any power increase,it was the stock maf
Because it's a POS!!!willys1 said:Yup,Its calibrated to my injectors.The motor is 100% stock except headers(shorties).This is such an easy bolt on,why am I having so much trouble
Yeah DUDE,mine pings too--WTF!!!PRO50SC said:In my opinion the Pro M is a POS. I had the exact same problem. Not only would the car run like crap when it was cold but it also pinged like crazy when it was warm. I put my stock unit back on and no problem. I have read a lot of threads where people have had the same problem. I'm sending mine back. I called their tech line and the guy gave me a bunch of stuff to check, that wasn't any help either.
You must be one of the lucky ones!5.0Droptop said:I have a Pro M and it works perfect. I have 24 # calibration for 24# injectors Never a problem.
88GTStreetRod said:I am having the exact same problem. I did not change my Mass air meter, but I put on new heads and intake. Once re-installed, I have the idle surge at times as well as the bucking at cruising speeds. I have changed everything from the MSD and coil to new throtle body, rotors, wires, plugs, etc.. Everything is new except for the Mass air censor. I have a cobra mass air and have 24lb injectors. My Mass air is a 19lbs mass air. It worked fine before the head and intake swap . I am thinking there is too much air or not enough with the 19lbs 75mm mass air. I was told by my speed shop that that with the cobra mass air you have to always have one less mass air meter then injectors, hence... 24lbs injectors and 19lbs mass air.
Any Ideas?
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