Coolant temp sensor?culprit? - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 04-06-2007, 03:19 AM
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Coolant temp sensor?culprit?

So reading many posts by Starmavin saying the leading cause of rpm surging & erratic engine behavior is coolant temp sensor/tps sensor. I've been experiencing a sudden cutoff of power, almost like your accelerating then throw the car in neutral, then back to drive. ( like the fuel has been cut off for a second). My question is, does the coolant temp sensor/tps sensor control the fuel injection, to cause this sort of problem?
Someone please help, this is really annoying. Thankyou. (yes, i've replaced my icv)

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#2 (permalink) Old 04-06-2007, 06:24 AM
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no, its gona be the fuel injectors, ecu, or maybe fule pump...

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#3 (permalink) Old 04-06-2007, 02:10 PM
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could be your plugs, when mine were bad, I would be accelerating then my car would kinda fall on its face. Does it make any noises at all when you lose power?



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#4 (permalink) Old 04-06-2007, 02:13 PM
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yea forgot about spark plugs

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#5 (permalink) Old 04-07-2007, 12:38 AM
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plugs are brand new.

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#6 (permalink) Old 04-11-2007, 04:37 PM
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It could also be one of your coil packs. That will make your accelerator surge a quit a bit. especially low to mid range rpm's
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#7 (permalink) Old 04-21-2007, 05:10 AM
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Quote:
Originally Posted by joshsanders82
So reading many posts by Starmavin saying the leading cause of rpm surging & erratic engine behavior is coolant temp sensor/tps sensor. I've been experiencing a sudden cutoff of power, almost like your accelerating then throw the car in neutral, then back to drive. ( like the fuel has been cut off for a second). My question is, does the coolant temp sensor/tps sensor control the fuel injection, to cause this sort of problem?
Someone please help, this is really annoying. Thankyou. (yes, i've replaced my icv)

So I think I may have fixed this problem. my uncle who is a mechanic, was working on my car and hooked it up to his computer scan tool. One of the things that came up was my battery was only at 11.4 volts, (basically dead)
so I replaced it. Since then this problem has not arose. Could it have been that under hard accel my car was trying to pull electrical juice from the battery to supply everything, but could not. that's the only thing i can think of. either way my car runs strong now. woot!

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#8 (permalink) Old 04-21-2007, 10:36 AM
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Hard acceleration places no added electrical burden to the system.

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