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Old 02-28-2003, 22:14   #1 (permalink)
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car stalls when ISC disconnected

Hey all,

according to the gregories the car should idle normally when the ISC solenoid is disconnected, but my car stalls....is this a misprint in the gregories, or is there sumpin wrong wit my ISC?

Thanks

Brendan
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Old 02-28-2003, 22:52   #2 (permalink)
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I think the idles too low & making the engine stall. The only way to overcome this would be either check the tps switch setting or adjust the idle screw, and then resetting the tps to 0.7 volts. Im sure this will fix your problem
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Old 03-01-2003, 01:44   #3 (permalink)
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how do you reset/adjust the tps,and why? The gregory's manual says u only have to do it on a manual car, not auto.
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Old 03-01-2003, 03:36   #4 (permalink)
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1 do a search on tps settings
2 An auto will have 2 tps switches & both of them should read the same
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Old 03-01-2003, 14:04   #5 (permalink)
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Quote:
Originally posted by svo302
I think the idles too low & making the engine stall. The only way to overcome this would be either check the tps switch setting or adjust the idle screw, and then resetting the tps to 0.7 volts. Im sure this will fix your problem
when the ISC is connected though, the car idles perfect at just about 700...should I maybe just take the "if it aint broke, dont fix it approach this time?"
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Old 03-01-2003, 18:12   #6 (permalink)
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I dont think you can adjust the TPS. Unlike on the lasers and telstars, the falcon TPS doesnt have any rotation movement...
If its out of range then it must be faulty. Id agree with svo302,
your base idle must be too low and the ECU is using the ISC to up the idle to stop it from stalling..

Brent
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Old 03-01-2003, 18:35   #7 (permalink)
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The Workshop manual for MPEFI describes winding in the idle screw so that the engine will actually idle (albeit high) - then you carefully wind it back out to get the specified base idle speed.

If it is working ok with ISC hooked up etc. then I'd suggest leaving it alone - the danger is that another situation might be occurring that the ECU is managing to control ok, but if you fiddle then you might upset things - it's all a ballancing act.
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Old 03-01-2003, 20:59   #8 (permalink)
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Still doesnt solve his base idle problem.
and with the TPS you use a drill & slot the hole so that you can actually achieve the desired 0.7v
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Old 03-02-2003, 21:06   #9 (permalink)
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Sorry - I was under the impression that the car was idling okay with the ISC connected so base idle wasn't a problem as such (only needs looking at if the car won't idle normally).
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Old 03-03-2003, 03:15   #10 (permalink)
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Quote:
Originally posted by EDFUTURA
Sorry - I was under the impression that the car was idling okay with the ISC connected so base idle wasn't a problem as such (only needs looking at if the car won't idle normally).

yeah your right EDFUTURA..its fine when it IS CONNECTED, but I disconnected it too see what would happen, and it stalled...the gregories said it shouldnt so I was wondering what the deal was....it idles perfectly with the ISC connected though!
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