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Back from Beyond
Join Date: Nov 2004
Location: Alberta, Canada
Posts: 2,697
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Running without throttle switch?
Guys, I've just done the top end in my 83 944. The car seems to run better without the throttle switch plugged in. It idles better, anyway - finally got a fast and regular idle. Until I hook up the throttle switch - which was installed a while back by a reputable shop and calibrated by them.
'Sup? Will running the car without the switch do any harm? If not, I'm just gonna unplug it and leave it. I realize it sends closed, part and wide-open throttle position indication to the DME, but isn't some of that redundant considering what the AFM does?
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'88 944 Auto - project, kinda '87 944 Auto - died saving my wife '84 944 5SP - crushed under shop roof during snow storm All others GONE! |
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10-14-2005, 10:36 AM
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Registered
Join Date: Nov 2003
Location: Calgary, AB
Posts: 1,883
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Not redundant at all.
The AFM is used for fuel metering. The TPS on your 83 will have idle, and WOT contacts, there is no part-throttle variable resistor like there is in other models/vehicles. So, it tells the DME when you're really stomping on it, so it can advance timing, and all the other little goodies that the AFM can't, as well as it tells the DME when to lean things out for idle (keep in mind idle AFR's can get pretty lean). Also, the TPS tells the DME when to use the idle stabilizer. If it runs better with the TPS unhooked, the first thing you should do is check out the instructiosn on Clark's garage on how to check/adjust your TPS, and if it's no good, replace it.
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2010 Hyundai Elantra Touring, GLS 5 speed, Indigo Blue Metallic. 2.0L of Korean fury! Buy my parts! |
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10-14-2005, 11:04 AM
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Back from Beyond
Join Date: Nov 2004
Location: Alberta, Canada
Posts: 2,697
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Thanx Zero - will check this weekend. I've got a spare switch I can swap in.
However, I still wonder if any harm can come not using the TPS.
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'88 944 Auto - project, kinda '87 944 Auto - died saving my wife '84 944 5SP - crushed under shop roof during snow storm All others GONE! |
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10-14-2005, 02:17 PM
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Ornery Bastard
Join Date: Sep 2001
Location: South Sound
Posts: 2,879
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Quote:
Aaron
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--------- Silver 1998 Volvo S70 T5 <- Daily (Anja) Guards Red 1986 951 <- Seattle car (Gretchen) White 1976 914 2.0 F.I. <- Prodigal car, traded away then brought back again (Lorelei) |
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10-14-2005, 05:02 PM
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