m20b25 hitting rev limiter at 2200 constantly!!! Vid inside

Moderator: martauto

User avatar
SOLID9
E30 Zone Newbie
E30 Zone Newbie
Posts: 6
Joined: Thu Jun 14, 2012 11:00 pm

Post Tue Mar 04, 2014 9:17 pm

Basics of my problem...

Had a 318is, chucked it and put in a b25. I drove the car it came out of, ran sweet. Put it in the other car ran sweet in the shop, went down the road bogged like hell wouldn't hardly get itself going past 3K RPM. Next day wouldn't hardly start and run. Found the fuel pump was shagged. Now it starts and runs but wont rev up. You can hold the throttle in any position you like above idle, it will go up to 2200 rpm, bang on the dot and fall back down. And it dose this very cosistantly. And again it will sit there and idle. Fuel and ignition checks out to be good. We are suspecting the air flow meter. Or possibly the crank sensor but figure that it wouldn't even start if it was the crank sensor.

Any methods for testing that air flow meter? They have always been like like a dark form of magic to me. Been seriously debating going to stand alone managment or carbs...

It's as if it has a rev limiter set at 2200. Also tried resetting the ECU, tested fuel system, ignition, TPS, IAC has nothing to do with it.... and many other things of the sort and nothing has even remotely changed the symptom.

Car+Problem=Fried brains for dinner

The bloody thing ran! And it ran well! :(
Last edited by SOLID9 on Tue Mar 04, 2014 9:19 pm, edited 1 time in total.
User avatar
SOLID9
E30 Zone Newbie
E30 Zone Newbie
Posts: 6
Joined: Thu Jun 14, 2012 11:00 pm

Post Tue Mar 04, 2014 9:19 pm

ross2009
E30 Zone Addict
E30 Zone Addict
Posts: 2762
Joined: Mon Nov 19, 2007 11:00 pm
Location: In my beemer MAN !!!! st neots CAMBS

Post Tue Mar 04, 2014 9:47 pm

tps maybe they fill up with oil take it off and drain it or try another one
Turbo M20
Image
v8 project 6.0 twin turbo
http://s924.photobucket.com/user/Rossco ... ject%20e30
User avatar
SOLID9
E30 Zone Newbie
E30 Zone Newbie
Posts: 6
Joined: Thu Jun 14, 2012 11:00 pm

Post Fri Mar 07, 2014 7:07 pm

Sorted! Thanks to everyone that scratched their heads about my problem :D

Turned out that when I shifted the harness to the other car, some brittle wires let loose and were reaking havoc in the loom. Most of the ones that were shorting out lead to the Mass Air flow connector and the 3 relay pack. So something there was giving me grief....

Anyways we are all good to go now!