Kammer111

I have reset my keep alive memory making my engine idle eraticaly. Did this by disconecting the neg lead on the battery for a while. How do I get it reprogrammed?

oldford

Should do that on it's own when the engine is warm. Take it for a test-drive (20 miles or so) and let it idle some time.
More info could be given if you tell us what car, model year, engine, etc.

Kammer111

It's a 1.6 cvh efi H reg xr3i. I would take it for a drive but its ideling at 4000rpm and there is no vacuum leaks so was Reading about the inlet in the manuel when it said that taking the neg lead off the bat will caus it to reset the kam. Just changed the head gasket.

MarkN

I've found that when I reset mine I can accelerate the idle speed learning process by unplugging the ISCV wire for about thirty seconds with the engine running and plugging it back in again. It saves leaving it idling on the driveway for ages, and there is no real difference in idle between the two methods.

However - I doubt that this would account for a 4000rpm idle speed. If it still idles like the clappers with the ISCV unplugged then there is another problem. It could be that the throttle isn't fully closing. Have you checked the cable is adjusted correctly and that it is actually fully closed at idle?

Kammer111

Yeah I have even taken off the cable. If that doesn't account for the revving then il take the inlet appart and check again for broken seals.

MarkN

Take off the crossover pipe and visually check that the throttle is closed.

You can check for broken seals by spraying them with WD40. It would have to be a very big break to leak enough air to get to 4000rpm. Have you also checked that you haven't got any bungs/hoses off of the various pipes to the plenum?

There is also a chance it could be the brake servo leaking.

Once you've checked the throttle and for leaks with WD40 I would suggest disconnecting the various hoses and plugging the holes to eliminate the other components.

Kammer111

I will do all that next time I see my car, stays at my dads while it's off the road.

martysmartie

iTrader: (1)

Goto have an air leak to cause that high a revs, caused by when you changed HG, did you use a new gasket set when reassembling? Check inlet manifold area for leaks. As said ECU will "adapt" when driven and remember fine adjustments.

Martin

Kammer111

Yeah I used a whole new gasket set.

martysmartie

iTrader: (1)

Spray WD40 sparingly around inlet manifold area, if air leak is present the idle speed will change.

Martin