My idle speed went up 2,000 RPM when I...

1972ACGT · 10-12-2003

when I changed my air filter setup.
I was running a 32/36 elec choke weber, with the weber-style air filter assy. on it. I recently switched to the weber adapter + original style filter assembly with a K+N inside.
After firing it up, the idle speed was around 2000 rpm. what gives? its performance seems the same. I didn't make any other changes, and after I re-adjusted the idle down to 1000, it acts normally.
Why would it have done this?

namba209 · 10-12-2003

Two things come to mind initially, the first, when you changed the filter assembly, you may have inadvertantly bumped the curb idle adjustment on the carb onto the high idle ramp. The second, you filter was so dirty that the engine was running extremely rich and with the clean air filter, it cleaned out and went to a happier engine speed. Just my $.02. But I can't believe my second opinion could have happened but it is possible.

Ron

Stanley_P · 10-12-2003

When I put on my adapter to the weber I had to grind off a little of the adapter. It was holding the choke flap down on top of the carb. I dont know if that is your problem but you might look there.

Stanley_P

Old Hippie · 10-13-2003

Also check to see if the filter housing may be touching any of the linkage.

1972ACGT · 10-13-2003

another thing... I always thought that it was weird that the idle adjust screw on the carb was almost maxed out. when I went to this air cleaner setup and adjusted the idle to 1000 again, the idle screw position seems more normal. that carb maybe has 3000 miles on it.

oldopelguy · 10-13-2003

There was a problem in the late 80's with the paper filters coming from some parts of the Far East. Seems there was a mix-up and they were making paper air filters using oil filter paper. Needless to say, they didn't work real well and seriously restricted flow. Could be you ended-up with one of those filters in the Weber housing and that you are finally now able to fully take advantage of the carb.

10-12-2003	#1 (permalink)
1972ACGT Opeler Join Date: Jul 2002 Location: Arlington, Tx Posts: 42	Unanswered: My idle speed went up 2,000 RPM when I... when I changed my air filter setup. I was running a 32/36 elec choke weber, with the weber-style air filter assy. on it. I recently switched to the weber adapter + original style filter assembly with a K+N inside. After firing it up, the idle speed was around 2000 rpm. what gives? its performance seems the same. I didn't make any other changes, and after I re-adjusted the idle down to 1000, it acts normally. Why would it have done this?

10-12-2003	#2 (permalink)
namba209 6,000 Post Club Join Date: Aug 2002 Location: Imperial Beach, CA South of San Diego Posts: 6,054 Provided Answers: 6	Two things come to mind initially, the first, when you changed the filter assembly, you may have inadvertantly bumped the curb idle adjustment on the carb onto the high idle ramp. The second, you filter was so dirty that the engine was running extremely rich and with the clean air filter, it cleaned out and went to a happier engine speed. Just my $.02. But I can't believe my second opinion could have happened but it is possible. Ron Last edited by namba209; 10-12-2003 at 10:05 PM.

10-13-2003	#6 (permalink)
oldopelguy Have Opel, Will Travel Join Date: Mar 2002 Location: Saint Michael, MN Posts: 1,727 Logbook Entries: 3 Provided Answers: 2	filter paper There was a problem in the late 80's with the paper filters coming from some parts of the Far East. Seems there was a mix-up and they were making paper air filters using oil filter paper. Needless to say, they didn't work real well and seriously restricted flow. Could be you ended-up with one of those filters in the Weber housing and that you are finally now able to fully take advantage of the carb. __________________ 1958 Rekord Sedan, 1958 Olympia Wagon, 1959 Opel Olympia Sedan, 1967 Kadett Coupe, 1967 Admiral Sedan 4L CIH-6, 1968 Kadett fastback 1.1L, 1970 Kadett Wagon Turbo 2.2L, 1971 Kadett Sedan 1.1L, 1975 Manta Wagon 4.3L V-6

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10-12-2003	#3 (permalink)
Stanley_P Member Join Date: Mar 2002 Location: Kentucky Posts: 311	When I put on my adapter to the weber I had to grind off a little of the adapter. It was holding the choke flap down on top of the carb. I dont know if that is your problem but you might look there. Stanley_P

10-13-2003	#4 (permalink)
Old Hippie Senior Contributor Join Date: Jun 2003 Location: Paxico, Ks. Posts: 787	Also check to see if the filter housing may be touching any of the linkage.

10-13-2003	#5 (permalink)
1972ACGT Opeler Join Date: Jul 2002 Location: Arlington, Tx Posts: 42	another thing... I always thought that it was weird that the idle adjust screw on the carb was almost maxed out. when I went to this air cleaner setup and adjusted the idle to 1000 again, the idle screw position seems more normal. that carb maybe has 3000 miles on it.

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