wouldn't rev past 2500 now wont even start!

[RpSinner]

well my car was running fine right after i picked it up from the shop where i got the swap done. drove it from sacramento to san francisco then to fremont no problem. then later on i was driving it on the freeway and i noticed it wouldnt go past 5k...then 4k...then 3k...and then 2500. i shut the motor off then tryed restarting it and it started up but still wouldnt rev past 2500. so i shut it off and tryed starting it again this time it had a hard time. shut it off again...then the next time it just wouldnt start anymore. so i towed him home let it rest for a couple days...fired it up and let it idle for a while...still wouldnt rev past 2500..but after a while of idling it died and wouldnt start again.

im thinking its the mafs but i could be wrong. has anyone else ever had this problem???

-andrew

[uno]

mafs or cas

[sandwichman]

das th3e exact problem yesterday. the plug to the MAF was not clicked in all the way. its fine now. good luck

[RpSinner]

Quote:
Originally Posted by johngriff
maf "re-wiring problems" can be dangerous, if wires cross, they can cook the ecm. SO... be careful. But here's a test. Take off the maf, start the car, it should start up (fuel and spark present) then you should NOT be able to rev over 2500 or so. If this is a change from the condition before.....?..... it should be the phsyical maf, if the problem persists, i would guess wireing.

WATCH OUT, alot of shops but conector maf wiring, if you do re-do it, make sure you sauder and heatshrink you're conections!!


John Griff

Email me!


ok so i removed the mafs and also unplugged it...i tryed starting it and when doing that id feel and hear it try to start up and also hear it back fire....so i put the mafs back in and plugged in...tryed to start it and it fired up but still wouldnt rev past 2500..i let it idle for a while until it just died on itself.

[HitAndRunCrew]

Dude, I would almost bet money on the ECU...but check that wiring on the MAF first...Dave

[RpSinner]

Dude, I would almost bet money on the ECU...but check that wiring on the MAF first...Dave

yo is this sacramento dave or are you the "other" dave? yeah i bought this motorset from dave in sacramento...

anyways...would there be anyway to test the ecu?

[TheSnail]

Since its craped out from 5 to 4 to 3 to 2.5 I would check the plugs. Rather then then a disconected MAF that would go from Fine to 2.5-3k instently. Other options, are to check grounds and clean the maf.

[HitAndRunCrew]

yo is this sacramento dave or are you the "other" dave? yeah i bought this motorset from dave in sacramento...

anyways...would there be anyway to test the ecu?

The Dave you bought the motor from...What happen to the other guy that I sold the motor to, try swapping out some of his stuff with yours...

[RpSinner]

The Dave you bought the motor from...What happen to the other guy that I sold the motor to, try swapping out some of his stuff with yours...

yeah that guys car and motor is long gone and sold...he moved back to riding bikes...but ill see if i can get a hold of someone local that might be willing to help me out and try their parts out on my car.

[RpSinner]

well i check the diag code and it came back as 22 (fuel pump)...that would explain why its having a hard time starting and staying on...but would that also cause it to not want to rev past 2500?

-andrew

[uno]

well i check the diag code and it came back as 22 (fuel pump)...that would explain why its having a hard time starting and staying on...but would that also cause it to not want to rev past 2500?

-andrew
no fuel pressure.

[RpSinner]

well i noticed when i was cranking it that there was a weird coughing choking scratchy noise coming from the throttle body area. anybody know what might that be?

[RpSinner]

back to the up

[RpSinner]

any ideas?

[uno]

i dunno about the throttle body scraping but did you ever get the fuel pressure issue solved?