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I have a 69 SQBK (Manual Trans, '72 E FI engine, '68 dizzy, more details at end of msg). After the car has been started, but before it's fully warmed up, the engine tends to buck unevenly and does not have full power (25 mph in 2nd, tops). After about 10 minutes, the the idle evens out. After the car has warmed up, randomly while stepping on the gas after stopping of shifting gears, there will be no power and it takes pumping the gas a few times for it to respond at all. From a full stop in some instances it stalls and requires starting the car over again. I ran through the tune-up procedure and notice the idle was very low on startup (600RPM), I assumed the Auxiliary Air Reg. (AAR) was broken, but when I close it with my finger over the opening, the idle dropped lower to < 400. I drove for a minute and the idle was up to about 1200 RPM and if I closed the AAR at that point, it dropped to about 850, where I set it. As the car warms up, the AAR closes off and the idle is steady at 850/900 (no surging). This idle problem is consistent, everytime I start the car, unless the engine is already warm from being recently driven. The off-idle problem (after the car is warmed up) is inconsistent. Sometimes when I am at a stop light and try to accelerate, the throttle does not seem to "catch up" and the car stalls. If I put the clutch in and rev the engine (with minor delay between pedal going down and engine RPMs going up), I can prevent the car from stalling, but it's a tough manuever and the car usually stalls. Part of me wonders if my idle setting is REALLY far off? The hoses to the AAR, the plenum and the pressure sensor appear to have no cracks. The first time I tried to adjust the low idle, I raised it from the cold engine 600RPMs to 900RPMs, but once the engine warmed up, it was at 1500-1800RPM. Any ideas would be appreciated. Memory tells me the car has had this problem a while, but other, larger problems have probably masked these symptoms. I know I had similar issues last winter and I replaced both temperature sensors which made a marked difference. --Jim Car details below: 1969 Squareback 1972 "E" FI system 1968 Dizzy, timed to 0 TDC, no shaft play, vacuum and mech. adv. working. Dwell 46 degrees (no change in dwell with RPM change) Both temp sensors check out with engine cold and warmed up Valves set to 0.06" TVS goes from 0 to inf. about 20 times when throttle pressed through range of motion. Fuel Press 30PSI at idle and in motion ===== completely out of date yet still boasting genuine meat by-products... http://www.machobeagle.com __________________________________ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org