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new 1989 coupe owner - couple of questions
Hi all,
I'm the proud 9th owner of a 1989 coupe 2.0e (UK), & I like the car, though predictably it's got a couple of issues: 1. Once the engine has warmed up, the revs pulse at idle, between 900 & 1100 rpm, about once a second. Funnily enough, my last bmw did a similar thing, & belive they both have Bosch management systems. Googling this group suggests that this could be a vacuum leak, or a bad / dirty ISV. Could there be another cause? Occasionally the car will stall while changing gears, which is probably related to the bad idle. 2. The accellerator pedal's resistance increases in a step, towards the end of it's travel - what's this? It certainly seems to make the car go faster! 3. The spare wheel bay is collecting water, is there a diy solution to this? Many thanks for any advice, Jamie |
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#3
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Jamie,
Congrats on the car. 1. It could also be the oxygen sensor. Try unplugging the ISV (clean it anyway - with "Throttle Body Cleaner" _NOT_ "Carburettor Cleaner" - TB Cleaner is more mild and won't damage the ISV's seals) and the Oxygen sensor individually and see if the removal of one or the other from the engine mgmt has any effect. Replacing the OXS isn't too bad nor expensive, once you've got it unscrewed (that's the hard part), you can splice in a 3-wire Bosch for, say, a Ford. 2. The added resistance is probably from a second butterfly opening in the throttle body. 3. Drill a hole in the bottom of the spare wheel bay.....just kidding.....you've probably got a leak in the weatherstripping, although it could be from any one of a number of places. Find the leak - use a hose, or a carwash - I've even heard of one person who stripped the trunk, and then had his SO close him in the trunk with a flashlight and then spray the car down to find the leak - I guess going that route depends on how much you trust your SO.......or know how to open the trunk from the inside...... Cheers! Steve Sears 1987 Audi 5kTQ 1980 Audi 5k 1962 and '64 Auto Union DKW Junior deLuxes (SPAM Blocker NOTE: Remove SHOES to reply) "Jamie Fisher" > wrote in message om... > Hi all, > I'm the proud 9th owner of a 1989 coupe 2.0e (UK), & I like the car, > though predictably it's got a couple of issues: > > 1. Once the engine has warmed up, the revs pulse at idle, between 900 > & 1100 rpm, about once a second. Funnily enough, my last bmw did a > similar thing, & belive they both have Bosch management systems. > Googling this group suggests that this could be a vacuum leak, or a > bad / dirty ISV. Could there be another cause? Occasionally the car > will stall while changing gears, which is probably related to the bad > idle. > > 2. The accellerator pedal's resistance increases in a step, towards > the end of it's travel - what's this? It certainly seems to make the > car go faster! > > 3. The spare wheel bay is collecting water, is there a diy solution to > this? > > Many thanks for any advice, > Jamie |
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"Steve Sears" > wrote in message ... <snip> > 3. Drill a hole in the bottom of the spare wheel bay.....just > kidding.....you've probably got a leak in the weatherstripping, although > it > could be from any one of a number of places. Find the leak - use a hose, > or > a carwash - I've even heard of one person who stripped the trunk, and then > had his SO close him in the trunk with a flashlight and then spray the car > down to find the leak - I guess going that route depends on how much you > trust your SO.......or know how to open the trunk from the inside...... Come on, guys! Just fill up the trunk with water, and see where it leaks! ;o) -- Gio |
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