Rev limiter
12-17-2003, 04:53 PM
#21
1.0 BAR
Join Date: Oct 2003
Posts: 520
Re:Rev limiter
Originally Posted by AbaZ
Try swapping the distributor.. more than likly the problem. Your Crank positon sensor is in their, and if it isnt reading right, you will get a low rev limit. The Cylinder sensor looses its output to the ECU, and it just cuts out. I've never heard of limp mode on a OBD0/1 car not letting you rev past a certain amount.
I know ---- all about obd0, but I promise you limp mode on OBD1 only allows 5000 rpm, idles @ 1500 and generally runs like total ----.
12-17-2003, 05:01 PM
#22
Administrator
Join Date: Dec 2002
Posts: 13,991
Re:Rev limiter
Hmm, explain what code or what type of situation you would be in to get into "limp mode" and get this "low rev limit" I'd like to reproduce it. If you get a Map or TPS cel you will still be able to rev over 5k, same with a IACV code. The car will run like complete *** and stumble, but should be able to rev.
12-17-2003, 05:14 PM
#23
1.0 BAR
Join Date: Oct 2003
Posts: 520
Re:Rev limiter
knock sensor, checksum invalid (or not disabled) on a rom, code 13 (PA sensor), injector test and a few other things that arent on the top of my head. the ecu has a backup microcontroller which is what takes over in the event of a limphome situation. at that point it is NO LONGER running off the main MCU... therefor its not using the main MCU's program if its internal rom or the external rom.
I agree, and I now don't think this is his problem after saying he didnt have a solid CEL on the dash (assuming this is a OBDI car). Maybe he has his distributor at full advance... I did that once accidentally and got results like hes reporting
Or maybe its got sensor problems like you also suggested.
I agree, and I now don't think this is his problem after saying he didnt have a solid CEL on the dash (assuming this is a OBDI car). Maybe he has his distributor at full advance... I did that once accidentally and got results like hes reporting
Or maybe its got sensor problems like you also suggested.
12-17-2003, 05:36 PM
#26
1.0 BAR
Join Date: Oct 2003
Posts: 520
Re:Rev limiter
Originally Posted by GimpyCivic
You guys arent hearing me, solid CEL doesnt mean limp... it just means trouble code has been set (obviously). If you wanna experience limp and have a socketed ecu, pull the ROM and then run the car. Then you'll know limp
12-17-2003, 06:30 PM
#27
3.0 BAR
Join Date: Apr 2003
Posts: 2,260
Re:Rev limiter
OK, here is my $0.02 on this thread (which, by the way, is getting way out of control):
Facts:
Limp mode OBD0 will have these characteristics, solid CEL (doesn't mean solid CEL = limp mode, but limp mode will haev a solid CEL), 3333 rev limit (based the code from the DASM), rough revving, between 1000 and 1500rpm idle.
Your problem: Cam timing is off. Check it, I bet your belt slipped.
CYP sensor will not cause improper rev limit, will however, cause misifing/detonation.
Facts:
Limp mode OBD0 will have these characteristics, solid CEL (doesn't mean solid CEL = limp mode, but limp mode will haev a solid CEL), 3333 rev limit (based the code from the DASM), rough revving, between 1000 and 1500rpm idle.
Your problem: Cam timing is off. Check it, I bet your belt slipped.
CYP sensor will not cause improper rev limit, will however, cause misifing/detonation.
You're probably a tooth, or a tooth and a half off.
