decrease in power in traffic then complete loss of power
22 June 2010, 05:02 PM
#1
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decrease in power in traffic then complete loss of power
Hi Guys
I was driving for about an hour reached some traffic, and the had a sudden loss of power, the car was struggling when I put my foot on the accelerator in first gear, and eventually it turned off. Just been towed to the garage. When I arrived there started the car and the power was back and it was purring like normal!? Any ideas? Cars just had a service has been running fine, its a completely standard P1.
I was driving for about an hour reached some traffic, and the had a sudden loss of power, the car was struggling when I put my foot on the accelerator in first gear, and eventually it turned off. Just been towed to the garage. When I arrived there started the car and the power was back and it was purring like normal!? Any ideas? Cars just had a service has been running fine, its a completely standard P1.
22 June 2010, 05:45 PM
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was the car struggling for power? like juddering? i took the maf sensor off a few mins after roadside and started the car and the problem was the same.
22 June 2010, 05:47 PM
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Mine was juddering and the thing felt awful but i am sure that if you had taken the sensor off and it was still doing it then it can't be that. Sorry mate but you have reached the limit of my technical know-how!!
22 June 2010, 07:15 PM
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With a disconnected (but otherwise good) MAF sensor the car should die immidiately.
Engine running on with it disconnected is a sure sign of a bad MAF.
Engine running on with it disconnected is a sure sign of a bad MAF.
22 June 2010, 10:04 PM
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the maf was disconnected by me, i started the engine and it was still losing power like it wasnt revving properly and just feeling soo sluggish when i hit the accelerator. so I just turned it off. After an 1hr -30mins or so at the garage i started it and the car was fine. the power was there as soon as i started it, i had it running standstill for 5 mins. No problem.
It was a really hot day today, dont know if the heat caused it? it was just strange!
It was a really hot day today, dont know if the heat caused it? it was just strange!
Last edited by p1bal; 22 June 2010 at 10:05 PM.
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22 June 2010, 10:07 PM
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Maybe you did not understand what i said.
If the engine is running, and you unplug the MAF sensor it should stop running immidiately.
If it continues running the MAF sensor is near the end of its life.
If the engine is running, and you unplug the MAF sensor it should stop running immidiately.
If it continues running the MAF sensor is near the end of its life.
22 June 2010, 10:10 PM
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It was still running, but seemed like it was on its last legs, no power, very sluggish and struggling even with it on. Basically the exact same problem. So you think its the MAF? because it was still running, but struggling like anything!
23 June 2010, 08:17 AM
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Lots of possibles...
Possibly dragged up some crap from the bottom of the tank,
dodgy o2 sensor,
MAF (i don't think unplugging it is really a solid confirmation of MAF failure, you need to see the running values to confirm a goosed MAF, im sure Mr Splitpin can confirm the best way to check for this)
Didn't the garage check the fault codes for you??
Possibly dragged up some crap from the bottom of the tank,
dodgy o2 sensor,
MAF (i don't think unplugging it is really a solid confirmation of MAF failure, you need to see the running values to confirm a goosed MAF, im sure Mr Splitpin can confirm the best way to check for this)
Didn't the garage check the fault codes for you??
Last edited by rookymatt; 23 June 2010 at 08:22 AM.
24 June 2010, 07:04 PM
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On some German cars yes, i think Subaru's aren't set up that way, not to mention a failed MAF may well be giving the correct reading at idle, but it could affect the way the ecu scales fuel as the rpms rise.
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