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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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Volvo 940 Wanting to Cut Out on Startup in MorningsViews : 1968 Replies : 43Users Viewing This Thread : |
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Nov 12th, 2018, 13:35 | #11 |
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Starting
Just to be sure: are you starting without touching the accelerator pedal? If not, the idle speed controller cannot set the idle speed and the engine speed will fall back to the basic setting of approx. 500 rpm, which is too low to keep it running when cold.
I would certainly have the throttle position sensor (TPS) checked as it "tells" the computer when to control the engine speed. |
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Nov 12th, 2018, 14:46 | #12 | |
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Hubby has checked later today if there is leakage from the t-junction at water jets, nothing leaking so must be the distributor as the orange cap reveals a crack of some sort he said. |
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Nov 12th, 2018, 14:49 | #13 | |
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Nov 12th, 2018, 14:51 | #14 | |
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Nov 12th, 2018, 16:49 | #15 |
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Update, husband started it again at lunchtime at work, the car was lumpy as buggery. Hes just been out to it again five minutes ago and ran like a dream. Hes hoping it will be fine when he finishes at 4.30pm.
Weird??? |
Nov 13th, 2018, 00:45 | #16 |
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It’s sounding like the idle control valve then, it’s under the inlet manifold in a rubber grommeted bracket with 2 jubilee clips holding it to the pipes and 1 electrical connector. Take it out and clean it and it should idle better but the crankcase vent is probably mostly blocked so it’ll blow oil into it again. It’s free to clean as long as you have carb cleaner or something similar to break the oil down.
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Nov 14th, 2018, 08:01 | #17 |
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Again yesterday and today bit lumpy again starting but the car runs like a dream as soon as it goes.
So idle control valve, well ill ask him to give it a clean this weekend before spending any more money on parts. |
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Nov 14th, 2018, 09:28 | #18 | |
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Nov 17th, 2018, 12:28 | #19 |
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Right now hes cleaned the idle control valve with carb cleaner its now lumpy and burning black smoke fromengine so the cleaner has made it worse. You can smell the carb cleaner. It was black inside, its now shiny.
How long should we leave it before starting car again? |
Nov 17th, 2018, 12:47 | #20 |
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Black smoke .... from the engine? Where is the smoke ?????
A damaged dizzy cap is a definite problem. Init. After cleaning a control valve? I guess, providing it has been done okies, not within my experience yet, then .... perhaps give the car a good drive ... it is still in recovery? And the electronics might need to sense and adjust to the situation. |
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