ELITE_KOV

I'm assuming this is limp mode... so I was driving to work and driving normally, but then I went to accelerate harder than usual onto the highway and the car literally would not Accelerate. It creeps extremely slowly. Doesn't really accelerate.

This has never happened to me before.

The only thing I can think of is this morning I went to start the car, keyless go, and accidentally took my foot off the brake before the car started.

Could this potentially cause limp mode?

Mods are just upper pulley and tune now.

ELITE_KOV

Any help, folks?

By the way, no CEL or codes.

.trunzx

Sounds like your accelerator pedal is faulty. Does the problem go away if you turn off the car and restart it?

ELITE_KOV

Thanks for the post.
well, I haven't exactly turned the car and restarted it to drive. I came to work and parked. I should be leaving for lunch, though, and I'll see if the problems continues.

Would the accidental letting off the brake pedal too quickly before the car actually starts (half starting the car almost) and release cause an immediate issue like this?

Thanks again, folks..

Hulk

No cel but did the esp message come on the dash?

ELITE_KOV

Hulk-
No, nothing came up on the dash. The car was acting completely normal other than the acceleration part of it. I was more or less going half WOT and it wasn't moving at all, just slowly creeping up in speed.

Hulk

Limp mode will usually give an esp

ELITE_KOV

Maybe just a hiccup then?

There was absolutely nothing else wrong with the car other than the acceleration aspect.

I'll unplug the battery (per shardul's advice) for an hour during lunch and hope that does the trick.


Any other ideas please post up, thank you.

kponti

Any mods? Any stumbling on fast acceleration? (sorry some peoples near x-rated signatures have made me turn all sigs off at work)

ELITE_KOV

Go fast mods are upper pulley and a dyno tune only.

That's the thing, the car doesn't accelerate at all, no blower engagement etc. Just VERY slow acceleration. VERY.

I have deleted secondaries and deleted resonator as well, but those shouldn't cause this.


Any other ideas fellas?

2000UZJ

Check your supercharger clutch and belt.

ELITE_KOV

Will do, thanks.

I should mention the car has a belt wrap kit on it as well - to limit slippage. Over 7K miles with the BWK, no issues.

Hulk

Check the sc pulley and belt also, just to make sure

ArmoE55

Would any/all of the above mentioned issues result in limp mode? The reason I'm asking is because he's not getting a CEL or any codes; I'm assuming he would for those culprits, no?

Hulk

Belt would usually give ESP, but happened to me once and no esp

ArmoE55

Did you have the issue again after that one time?

Hulk

No sir

ELITE_KOV

Intake Temps were fine, 40-50F, cruising while still acting up...

I ran an OBD scan with my PLX OBD II reader for codes.

Only got a "pending code"...whatever that means?

P0111 - Generic
Powertrain - Fuel and Air Metering/Intake Air Temp Sensor Circuit Range/Performance, Bank 1

P0111 - GM
Powertrain- Fuel and Air Metering/IAT Sensor Performance Conditions

Cause - Key On or engine running for 2 seconds then PCM detected that the IAT sensor input changed 0.3v in 250 milliseconds


So, now I'm wondering if that mis-start this morning cause this as the car sounded like it turned on but I let off too soon.

It was in slight limp mode-ish, then the car opened up after 15 mins driving back home. Did some half WOT runs and full WOT to check IATs, they went to mid 90s, then recovered well and quick back into the 40-50 range in a minute or so. I can safely say I ruled out the IC pump.

All seems fine now, but just that pending code, which might just be a hiccup after all.



Thoughts?

tolentino71

Disconnect your battery for about 5 minutes. This will reset your ecu and hopefully bring things back to normal again. Good luck!

Max.H

MB recommends not do this for loss of memory on some features but, I agree hard reset is good once in awhile.

If I remember correctly. You will need to re teach your windows and sunroof for a few cycles and obvious stereo settings. Cant remember if you need to do anything else when you disconnect positive and negative terminals for hard reset.

Anyone know?