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Guest Message by DevFuse
 

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why do I have to push pedal to the floor for starting??


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11 replies to this topic

#1 Petersubaru

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Posted 07 March 2005 - 01:35 PM

in order to start my 86 GL10 turbo in the morning, I have to push the pedal to the floor to start it immediately(if I don't hold the pedal down it will take much longer..once it warms up you will only have to touch the key and it fires up...could this be the coolant sensor or is it something else...I am open to all ideas

#2 Forkspear

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Posted 07 March 2005 - 03:48 PM

My 87 RX is like that. I removed the auxillary air valve. If i dont hold the pedal about half way it tries to start right away and then continues cranking. Then i have to hold the pedal to the floor to get it to start. When it is warm there is no problem. I think your auxillary air valve is out of adjustment or not working.

#3 Qman

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Posted 07 March 2005 - 05:26 PM

Temp sensor would be my educated guess. Not the guage sending unit but the sensor for setting cold and warm start. The ECU uses this sensor for setting fuel mixture and such.

#4 Petersubaru

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Posted 08 March 2005 - 02:47 PM

any idea where the auxillary air valve might be located on an 86 loyale mpfi turbo..........

My 87 RX is like that. I removed the auxillary air valve. If i dont hold the pedal about half way it tries to start right away and then continues cranking. Then i have to hold the pedal to the floor to get it to start. When it is warm there is no problem. I think your auxillary air valve is out of adjustment or not working.



#5 soobscript

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Posted 08 March 2005 - 07:40 PM

My 88 RX never needs clutch, but makes starts a little easier in intense cold. However, it always needs throttle in cold. Coolant is full of engine oil and I'm getting a code 21 - coolant temp sensor.

#6 Forkspear

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Posted 09 March 2005 - 12:09 AM

It is on top of the thermostat housing.

#7 subynut

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Posted 09 March 2005 - 03:36 AM

If it's like my sister's old 89 SPFI wagon, then yeah, coolant temp sensor. Stubborn as a mule when cold, happy as a lark when warm.

#8 torxxx

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Posted 09 March 2005 - 03:39 AM

yea thats what it is. we had a SPFI at the shop that did that

#9 royboy159

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Posted 12 March 2005 - 02:13 AM

Hey Peter----Do you also find it idles too fast at times before it's completely warmed up?

#10 Petersubaru

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Posted 16 March 2005 - 11:44 AM

yes, when I start it up... revs at about 1600-1800 until it warms up and then stays fairly stable at 800 and at times it will shake at the idle even though there is no change in the idle speed

Hey Peter----Do you also find it idles too fast at times before it's completely warmed up?



#11 MilesFox

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Posted 16 March 2005 - 02:25 PM

Temp sensor would be my educated guess. Not the guage sending unit but the sensor for setting cold and warm start. The ECU uses this sensor for setting fuel mixture and such.


my experience with a bas ecu temp sensor is the car would run fine when cold, but once she warmed up the car would run like crap, and if it were stalled it would have to sit for a good half hour before it would start again

this part cross references with nissan 240 sx if you cant find a listing for subaru. get the brown top version

#12 royboy159

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Posted 17 March 2005 - 01:56 AM

yes, when I start it up... revs at about 1600-1800 until it warms up and then stays fairly stable at 800 and at times it will shake at the idle even though there is no change in the idle speed

Hey Peter----The idle revs should drop steadily from the 1600-1800 in the 5 to 6 minutes it takes to warm up. High idle revs during that time can indicate a bad temp sensor. I'd also expect a stored diagnostic trouble code for the temp sensor in the ECU. roy:)




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