Hey guys,

Just bought an 87 "7" (non-turbo) and I'm loving it. The motor seemed to be in great shape, and my local rotary guy went over everything and said it was running great. I then bought one of those adapters that goes on your MAF to mount a cone filter instead of the airbox, and also put in a little breather filter. The car seemed to get a decent power gain out of this, and was running fine, but a couple days later it started idling pretty rough. Did I inadvertantly cause a vacuum leak someplace? Or is it running too lean from the new filter? Anyone else have this happen?

Thanks!
-Rob

 

Unless your AFM found a dead spot (check codes), it's probably a vac leak...

Check the AFM input voltages at the ECU to rule it out...


https://www.rx7club.com/2nd-generation-specific-1986-1992-17/troubleshooting-your-car-ecu-340578/

 

Thanks, I'll check that out.

 

Did you unplug the MAF at all???

 

no, at least not intentionally. I'll check the connections on that too. Thanks.

 

could be all the hot air your getting from just slapping a filter on the maf... check the sig for a cold air intake