Limp Mode Issue Resolved
06-28-2020, 06:08 AM
#26
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Also... realized that the code reader actually said mil off no codes. Just the dash light on after 5 seconds running and goes into limp. So somehow the pcm knows something’s not right, cel comes on, goes in limp mode, but can’t register at the obd port.
01-11-2022, 07:00 PM
#27
Thank you
Wanted to share with anyone facing similar limp mode issues what my resolution was
(as many problem threads end in no answer once op gets it fixed).
A friend with me had a obd2 imagine that. Only codes were rear o2 and misfire cyl 2.
04 manual - zero idle/starting issues.
New ignition about 2k miles ago
d585 coils / new plugs / msd wires
no cat (midpipe)
119,500 chassis (49,5k 2nd motor under warrantee from p/o)
Problem started 2 nights ago coming home from a really intense storm, 4+" of rain, standing water on the highway, no one going over maybe 45 in a 65. I go to leave around 4:30am and my series 1 is in limp mode, won't get above 3000 rpm if that. Hills are worse at around 25mph tops, felt a lot like a rev cut (not fuel cut). Otherwise it started and ran fine, no odd sounds/vibrations, power 1-3k felt normal.
I swapped my old coils as my only codes were misfire cyl 2 and the rear o2 (from no cat). Checked the SSV which moved fine. Did the NVRAM brake pedal rest and battery resets. It is extremely annoying there was not a code for this connector misreading/shorting! >:|
Long story short I pulled the pass front wheel off to pull the OMP connectors (as everything I read said limp mode is "always" OMP). Sure enough, the OMP switch connector pointing straight down, was completely full of water. Dried them out, put die-electric grease in the plugs, battery back in and CEL turned off. Let it warm up, and limp mode had gone away.
I know water in plugs is a common issue (like power steering which also happened on mine) but if you have limp mode CHECK YOUR OMP. Don't waste time looking at anything else until you know the OMP wires, plugs, etc are dry, not shorted/stripped. From most of the other stories I've read, the codes don't tell you it is a OMP issue.
(as many problem threads end in no answer once op gets it fixed).
A friend with me had a obd2 imagine that. Only codes were rear o2 and misfire cyl 2.
04 manual - zero idle/starting issues.
New ignition about 2k miles ago
d585 coils / new plugs / msd wires
no cat (midpipe)
119,500 chassis (49,5k 2nd motor under warrantee from p/o)
Problem started 2 nights ago coming home from a really intense storm, 4+" of rain, standing water on the highway, no one going over maybe 45 in a 65. I go to leave around 4:30am and my series 1 is in limp mode, won't get above 3000 rpm if that. Hills are worse at around 25mph tops, felt a lot like a rev cut (not fuel cut). Otherwise it started and ran fine, no odd sounds/vibrations, power 1-3k felt normal.
I swapped my old coils as my only codes were misfire cyl 2 and the rear o2 (from no cat). Checked the SSV which moved fine. Did the NVRAM brake pedal rest and battery resets. It is extremely annoying there was not a code for this connector misreading/shorting! >:|
Long story short I pulled the pass front wheel off to pull the OMP connectors (as everything I read said limp mode is "always" OMP). Sure enough, the OMP switch connector pointing straight down, was completely full of water. Dried them out, put die-electric grease in the plugs, battery back in and CEL turned off. Let it warm up, and limp mode had gone away.
I know water in plugs is a common issue (like power steering which also happened on mine) but if you have limp mode CHECK YOUR OMP. Don't waste time looking at anything else until you know the OMP wires, plugs, etc are dry, not shorted/stripped. From most of the other stories I've read, the codes don't tell you it is a OMP issue.
06-13-2022, 08:45 AM
#28
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Location: East Moriches NY
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Limp mode question
I'm not sure if this ties to this string. I have read all of these posts on limp mode but I'm not sure if my issue is limp mode. I've checked the plugs as said in this string and everything looks okay. I have no error codes. But if I just leave the car idle after a short period it seems to drop into sort of an low idle. If I step on the gas it has no effect. I have to turn the car off and then restart it so it goes back to normal. Probably about 1 to 3 minutes before this happens. Is that limp mode?
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