Poor start up on cold engine.
06 February 2010, 04:38 PM
#1
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Poor start up on cold engine.
Hi guys,
Need some advice please. When starting my 1995 wrx from cold it struggles to rev/tick over for approx.30 seconds then seems to clear itself and revs up to 2000rpm then as it warms up slowly drops too around 1000rpm. I don't know if this is down to the fact that it dont get used much. (to work on monday, back home friday. The joys of been a hgv driver.)
Any help or advice would be appreciated
thanks in advance.
Need some advice please. When starting my 1995 wrx from cold it struggles to rev/tick over for approx.30 seconds then seems to clear itself and revs up to 2000rpm then as it warms up slowly drops too around 1000rpm. I don't know if this is down to the fact that it dont get used much. (to work on monday, back home friday. The joys of been a hgv driver.)
Any help or advice would be appreciated
thanks in advance.
06 February 2010, 04:57 PM
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This could be 2 things off hand, first is the maf sensor and the second is the coolant temp sensor failing, either way they will get worse, you need to do a diagnostic on your car, dealer equipment is better than most of the other techniques and then a technician to check for any other issues, but its up to you.
Tony
Tony
06 February 2010, 06:26 PM
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I had the same sort of thing as you, the fuel i was using was tesco super,
i switched to shell and it seems to have helped,
This came after trying many different sensors but nothing was helping.
i switched to shell and it seems to have helped,
This came after trying many different sensors but nothing was helping.
06 February 2010, 06:53 PM
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Thats funny as it's on tesco super now due to the fact i pass by on my home on a friday,used to run it on v power all the time shall have to start filling up on a sunday with v power see if it makes a difference.
12 February 2010, 08:50 PM
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Tesco petrol gets my CEL to flash .... Knock Sensor is the reported fault - it remains off when using other petrol.
Will not touch Tesco petrol .... don't care if it is £105 with the 5p a litre off offer!
Will not touch Tesco petrol .... don't care if it is £105 with the 5p a litre off offer!
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12 February 2010, 10:15 PM
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Have had the opposite, poor shell topped up by good Tesco. From what you have put the factor could be the forecourt you are using, if their tanks are dirty then that will cause issues. Hence moving to another garage with clean tanks whether it is Tesco or Shell will show a improvement.
Last re-map to 416 bhp on tesco 99.
Last re-map to 416 bhp on tesco 99.
Last edited by 360ste; 12 February 2010 at 10:16 PM.
12 February 2010, 10:20 PM
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mine did exactly the same(1993 wrx) struggled when cold and reved to 2000 then back to 1000 repeatedly til warm then was 100% ok turned out to be the coolant sensor
12 February 2010, 10:31 PM
#10
i had this issue when i used tesco 99 ron. i tried all sorts including a new coolant temp sensor. then i tried v power/optimax and the problem has never come back. the problem with tesco 99ron is the high ethanol content. it doesnt work well in cold weather.
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