gareth001
04-01-2012, 02:18 PM
I had my car tuned last month at Eurospec, however following this the tuner and I are having problems with the idle - any thoughts on the following:
From cold the car starts at around 2k and drops down to normal idle of 650 - so all good.
If I blip the throttle to 2-3k and lift off, it will return to 650 but will hunt around +/-50-100rpm for a few seconds.
If I get the car warmed up and park up for about 20 minutes and turn the car back on, first start will cause the car to stall, only with some throttle will it start. When it does start the idle will fluctuate +/-500rpm until it's back up to operating temp.
When the car was tuned it was found that the f-con already had a MAP sensor installed, but the MAF was still connected to the stock ECU. Since the tune the MAF has been disconnected with no ill effects that I can tell, but the above symptoms are still there. Any thoughts? Is there something in the stock ECU that's trying to take over from the f-con?
The f-con hadn't been plugged in since I got the car, so has been running on stock ECU (didn't know this until got to Eurospec). On stock ECU it was rich, but it did have a cone filter before the MAF, so I'm assuming this was the problem.
From cold the car starts at around 2k and drops down to normal idle of 650 - so all good.
If I blip the throttle to 2-3k and lift off, it will return to 650 but will hunt around +/-50-100rpm for a few seconds.
If I get the car warmed up and park up for about 20 minutes and turn the car back on, first start will cause the car to stall, only with some throttle will it start. When it does start the idle will fluctuate +/-500rpm until it's back up to operating temp.
When the car was tuned it was found that the f-con already had a MAP sensor installed, but the MAF was still connected to the stock ECU. Since the tune the MAF has been disconnected with no ill effects that I can tell, but the above symptoms are still there. Any thoughts? Is there something in the stock ECU that's trying to take over from the f-con?
The f-con hadn't been plugged in since I got the car, so has been running on stock ECU (didn't know this until got to Eurospec). On stock ECU it was rich, but it did have a cone filter before the MAF, so I'm assuming this was the problem.