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, Sat, 4 Nov 2000 00:09:55
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Folks,
1988 8valve. When I bought it the cold start derivability was pretty bad. She stalled, coughed, and hesitated.
Got Bentleys, a CIS tester, and a MityVac tester. I tested the warm up reg., aux. air and lambda pulse. OK. Tested all the vacuum lines,per fender diagram, found a bad diaphram on the charcoal canister. Suddenly the stalling and coughing stops. The hesitation is still around. When its below 60deg the car starts fine. I wait about 30 seconds and slip into gear(auto). If I give any gas I have to wait maybe 10-20 seconds before the car moves/idles up. If I feather the gas she wants to stall. My only option is to give gas and wait, otherwise she stalls.
So I put the CIS tester on this weekend. Cold of course. Disconnected the fuel lines. No pressure! Ok, that's not good(tested Sunday, last driven Fri.) Tested the cold/hot control pressure, tested just fine at the high end of the range(over the 40psi system I saw). I could not test the system pressure by jumping the relay. I jumped 30 & 87 and the fans turned on, not the fuel pump. I jump 30 & 87b and the AC pulley jumps on. Using the ignition key I tested the system pressure and only got 40 psi(I swear I closed the CIS tester valve??). Weird but everything else worked fine. As it turns out, the residual fuel pressure stayed at 40 psi for over 30 minutes.
So the control pressure works just fine. What next? I hooked up the vacuum gauge to the dist. port on the throttle body. At 850 RPM idle no vacuum? At 2000 RPM, 19 in-hg. No where in Bentley do they suggest vacuum readings as a test. Is this a healthy reading? I'm assuming that this port has no manifold vacuum with the throttle closed! With all this talk about vacuum leaks lets get some numbers together from a healthy car!
BTW, I've done a complete tune-up. Fuel, air, oil filter, spark plugs. And the throttle body was cleaned twice, by SAAB then an indie. What gives?
ED
1988 base 900, 8 valve, 4dr, at
, Sat, 4 Nov 2000 00:09:55, Mon, 6 Nov 2000 13:14:04
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