Stalling, then hard to start... Weird A/F.
05-31-2006, 01:29 PM
#1
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Stalling, then hard to start... Weird A/F.
Hello guys,
Got a problem. It's a '86 952, K27, Huntley MAF, ARC II.
Runs fine mostly with LM-1 reading about 14.0-14.4 for cruise. On throttle, it richens to 13.5-12.8 and on boost I go to 11.3-10.8.
Problem is sometimes when I'm driving, no fixed occurence, the car will stall. It's a sudden loss of power. And when I look at the LM-1, it's shows 8.6-9.4 and says, "Too Rich".
I pull out the DME relay and crank. Clears the A/F to about 18.7-20.2. Put the DME back and crank. Back to a too rich situation showing about 10.3.
Sit a while more, crank and it's ok. It has happened a few times and it's embarresing.
I renewed all the sensors. ISV seems to be working. How do I confirm?
Thanks in advance.
Sprint.
Got a problem. It's a '86 952, K27, Huntley MAF, ARC II.
Runs fine mostly with LM-1 reading about 14.0-14.4 for cruise. On throttle, it richens to 13.5-12.8 and on boost I go to 11.3-10.8.
Problem is sometimes when I'm driving, no fixed occurence, the car will stall. It's a sudden loss of power. And when I look at the LM-1, it's shows 8.6-9.4 and says, "Too Rich".
I pull out the DME relay and crank. Clears the A/F to about 18.7-20.2. Put the DME back and crank. Back to a too rich situation showing about 10.3.
Sit a while more, crank and it's ok. It has happened a few times and it's embarresing.
I renewed all the sensors. ISV seems to be working. How do I confirm?
Thanks in advance.
Sprint.
05-31-2006, 02:13 PM
#3
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>>ARC II or TPS?
Yes, I have the ARC II. It's set at 9.30, 2.30, 11.00 and 2.30.
The TPS seems to work. Am I testing it right? At 3000rpm or in fact, any rpm, I lift off the throttle and I see the A/F on the LM-1 lean out all the way.
Can a TPS have intermittant failure?
Sprint.
Yes, I have the ARC II. It's set at 9.30, 2.30, 11.00 and 2.30.
The TPS seems to work. Am I testing it right? At 3000rpm or in fact, any rpm, I lift off the throttle and I see the A/F on the LM-1 lean out all the way.
Can a TPS have intermittant failure?
Sprint.
05-31-2006, 04:14 PM
#4
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The turbo TPS can fail anywhere along its travel.
http://www.arnnworx.com/tps-repair.htm
Just make sure you are not having problems with any of your arc settings.
This is just an old set of documens(in zip format) that might help.
http://www.needmoreboost.com/testarossa_td/arcII.zip
http://www.arnnworx.com/tps-repair.htm
Just make sure you are not having problems with any of your arc settings.
This is just an old set of documens(in zip format) that might help.
http://www.needmoreboost.com/testarossa_td/arcII.zip