RE: Tuning old cars

Hacka_Dave — Wed, 30 Aug 2006 02:52:13 GMT

rossphotography (6/5/2006)

I have an old 1982 Mitsubishi Colt and am slowly trying to tune it myself. I am having great difficulty balancing the fuel mixture I feel its running too rich. Anyone got any tips on making these things run better?

Have same problem with a 1979 Datsun 200B. When I got it 2 or 3 years ago (as a 2nd car), the thing wouldn't idle, ran rough as the proverbial etc.

Did the usual, and replaced a lot of the ignition parts, and ended up replacing carby (found one @ wreckers). Before conking out a few months or so ago, had a habbit of increasing idle RPM by itself, taking several pumps of accellerator to settle it down.

Has always had a timing issue (run on after key is off), but is a mongrel to get timing right, plus had moments whilst driving when it'd just decide to loose power. It did this a while ago at an intersection, so, as had worked before, i tooke her out of gear, and gave the engine some gentle RPM's, then did the old 'vroooooooom' (high revs in short bursts) which usually fixed it, but that day, it wound up refusing to start.

Adjusting fuel/idle screws did SFA to help, and even tow starting was ni good - it'd try to fire but that's it - try to keep it running was pointless - it wouldn't.

So it was towed home, had a fiddle, and has been touched until recently. Replaced battery, and did the fuel down carby thing - it fires, runs a couple of seconds, (rough - 3 cylinders i think) then stops. Try retarting and it won't.

Tried adjusting mixture again but does nothing. Have new spark plugs waiting for it, plus needs oil change (odometer doesn't work, and motor , whilst being a L20B, looks as if it is a replacement - unknown k's)

Any advice would be greatful.

Otherwise I might have to flog it off and/or sell my 96 navara andbuy a reasonable auto wagon (Magna - as they sem to be cheap).

Dave

RE: Tuning old cars

marcel12 — Mon, 21 Aug 2006 21:06:24 GMT

I also have a Colt with carby problems. Mine is an 87, 1600, and my mechanic tells me to be prepared to spend $600 - $700 for the Carby to be reconditioned.

Mine also needs a new engine.

Tuning old cars

rossphotography — Mon, 05 Jun 2006 12:56:27 GMT

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