So on cold starts it idles around ~700 but almost dies when given any throttle until it warms up. However, when its warm it runs great but idles at ~1300. No, there arent any vacuum leaks. I have replaced every gasket and smoke tested it. I was really thinking DME coolant temp sensor but resistance figures seem to be correct. Gas mileage is shit too. Im out of ideas.. anyone have any insight?
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sigpic'89 325i
M60 swap in progress -
Any codes?
Stuck ICV?
Does the TPS test good? -
clogged fuel filter?Originally posted by ebelements
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Fuel filter is newish. But that wouldn't explain the high idle. Justin, my CeL has just always been on due to my lack of a char coal canister. Can't get the stomp test to work. I tested the tps a while back and all was well. What's wierd is I can get it to idle at 700 if I unplug and plug in the icv real quick while it's running. When I plug it back in it idles perfect at 700 for about ten seconds and then just jumps back up to 1300
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A Peake code reader is WELL worth the small investment.
You can test the ICV, beyond making sure the valve isn't stuck (should hear a clicking when you shake it). You can test resistance between terminals.
Terminals 1 & 2: 20 +/- 5 ohms
Terminals 2 & 3: 20 +/- 5 ohms
Terminals 1 & 3: 40 +/- 5 ohmsComment
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Just tested the tps and it went from 1.6k closed to 4.47k wide open. I'll check the iac now
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check your throttle stop, make sure it isn't holding the throttle slightly open... I've seen this on an E36 before... different motor I know but same symptoms.Comment
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Throttle stop is good. I pulled codes and got one for the lack of a char coal canister and one that said "CAN message"
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Also, it is to my understanding that with an auto harness I don't need to modify anything. I just chopped off the extra plugs. But..I'm using an auto dme..do I need to have a chip from a manual in there or does it not matter? I have no evap stuff just the vent line with a filter on it. Would I need to put a resistor or ground something out on the purge valve connector?
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Originally posted by Jack89i View Post
Nope, I actually just got done verifying all of that myself. Plug the throttle body inlet and vent the tank, that's what I've been running the past 3 years. Leave the purge valve unplugged. I just installed the entire system to see if it would change anything on my car, it did nothing but turn off the CEL, so I removed it all again.
The unmodified auto harness works as well. I installed one on my car a few years ago temporarily, and it made no change to anything. My spare DME is a stock auto DME, it runs perfect with it installed.Comment
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