RPM Flare on Cold Start
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- Posts: 165
- Joined: 2021 Feb 16, 10:09
- Location: Knoxville, TN
- Vehicle Information: 1986 Capri 306, Twisted Wedge heads, RPM II Intake, Anderson B3 cam, 80Lbs Siemens Injectors, MAC Longtube Headers, G-Force T5, Spec 6 Puck Clutch, Ford Racing Aluminum Driveshaft.
RPM Flare on Cold Start
For starters my 03 Mach is still running off the stock tune. Im hoping to have time in the coming days to start tuning it again. I feel i have all the mechanical bugs worked out and im at a good point to start tuning. The first thing i want to address is the RPM flare on cold starts. When it first starts the rpm will flare up to around 2200rpm. This may be normal but seems high to me. Do i need to adjust CRANK ISCDTY to bring down the rpm? The other issue i want to address is with the ac compressor running, whether in AC mode or defrost mode, the engine will sometimes, not all the time, stall after the rpm has settled back down after pressing in the clutch and coming to stop. Part of me thinks that there may be to much pressure in the ac system creating a load on the engine but im not sure. The AC blows nice and cold in hot summer heat. Anyway, any advice would great.
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- Posts: 165
- Joined: 2021 Feb 16, 10:09
- Location: Knoxville, TN
- Vehicle Information: 1986 Capri 306, Twisted Wedge heads, RPM II Intake, Anderson B3 cam, 80Lbs Siemens Injectors, MAC Longtube Headers, G-Force T5, Spec 6 Puck Clutch, Ford Racing Aluminum Driveshaft.
Re: RPM Flare on Cold Start
On the declutch stalling issue, would i need to kick up FN894 Daspot MIN Clip at 800 rpm?
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- Posts: 5098
- Joined: 2021 Feb 15, 12:23
- Location: Metairie, LA
- Vehicle Information: Work Truck
'19 F-150 3.3L
Re: RPM Flare on Cold Start
No, crank iscdc is only during cranking and key off, soon as it fires off it goes in to idle which is derived from idle air.
What all do you have done ?
What all do you have done ?
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- Posts: 165
- Joined: 2021 Feb 16, 10:09
- Location: Knoxville, TN
- Vehicle Information: 1986 Capri 306, Twisted Wedge heads, RPM II Intake, Anderson B3 cam, 80Lbs Siemens Injectors, MAC Longtube Headers, G-Force T5, Spec 6 Puck Clutch, Ford Racing Aluminum Driveshaft.
Re: RPM Flare on Cold Start
97 lincoln short block, 04 C heads, 01 cobra cams, longtube headers and a x-pipe. Its a 5 speed car. The egr, rear o2s and knock sensors are deleted. The knock sensor harness was cut when i got the car and i had a hard time tracking down one so i left them out. The car runs good on the stock tune. Good drivability, averages around 20mpg.
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- Posts: 5098
- Joined: 2021 Feb 15, 12:23
- Location: Metairie, LA
- Vehicle Information: Work Truck
'19 F-150 3.3L
Re: RPM Flare on Cold Start
Thats just a stock car it should run like stock.
Make sure your throttle stop is set correctly.
Read the idle air and dashpot write ups.
Make sure your throttle stop is set correctly.
Read the idle air and dashpot write ups.