Lumpy Idle on W201 190 (carb) 1988
I'm trying to fine tune and problem solve a lumpy idle. (2.0L with Stromberg 175CT carb)
Symptoms: Start engine and revs at only 5-600 revs for 1-2 seconds, then goes up to 1800-ish revs As car warms up revs can get as low ar 500 when idling. Only ever stalls within 1 second of starting, never after this. When idles before and after being warm is 'lumpy' and shakes the car slightly. It might be ok for a few seconds then the idle changes and the car vibrates. Things I have done: Head gasket (and skim) - blown 4th to coolant New distributor cap and rotor Replaced all vacuum tubing I can see Cleaned carb and replaced needle, jets, diaphragmetc - did it myself however New timing chain Idlesettings ~800-830 and 1800 (a bit faster than specification) Any ideas why it is: Slow to get to fast idle revs on cold start? Idle gets very slow just before gets to full temp? Has a lumpy idle? Thanks for any help.... |
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