New motor running rough
Thread Starter
Teching In
Joined: Oct 2014
Posts: 44
Likes: 5
From: Fort Worth - Texas
New motor running rough So just got done putting in an LQ4 this past week. Car runs, but it's pig rich (10 MPG max), surges, idles rough, kr up to 9 at light throttle, and will stall occasionally. I just now noticed on my scanner that my MAP sensor is constantly reading 3.1 inHG; from idle to throttle. The shop put a "start-up" tune on it to break in the motor before it goes on the rollers. Would a bad MAP sensor cause all these issues? Or could it just be a crap tune?
Its also throwing a
P0101- Mass or Volume Air Flow Circuit Range/ Performance Problem
P0507- Idle Control System RPM higher than expected
Thanks
Its also throwing a
P0101- Mass or Volume Air Flow Circuit Range/ Performance Problem
P0507- Idle Control System RPM higher than expected
Thanks
TECH Fanatic
Joined: Aug 2004
Posts: 1,373
Likes: 4
From: Auckland, Nth Is, New Zealand.
Sorry mate, but once again I can't believe the mindset of some. Is it just a US thing due to the way you treat the Dyno.
Here any mods that will affect the tune, the car goes on the Dyno straight away so the tuner can do his thing.
No mail order tunes or something temporary, we get the car on the Dyno, no ifs or buts.
Here any mods that will affect the tune, the car goes on the Dyno straight away so the tuner can do his thing.
No mail order tunes or something temporary, we get the car on the Dyno, no ifs or buts.
Id have it checked asap. If its really rich it could wash the cylinder walls and you're gonna be in some trouble. Send some logs to the tuner or have him look at it in person.
