marcum@fortune.UUCP (Alan M. Marcum) (11/16/83)
I had similar sorts of problems with a '75 Olds 350 4bbl. The problem only showed up when warm, and WORSE in the winter. It also led to stalling at low idle. Turns out the problem was insufficient voltage to the plugs, because of a problem in the EFI chip. Upon replacing the EFI chip (which tested OK according to GM's nifty EFI chip testing machine!), all ran well. The reason for the increasing effects in the winter was changes in composition of gasoline in the northeast during the winter. Alan M. Marcum Fortune Systems, Redwood City, California ...!hplabs!hpda!fortune!rhino!marcum
wjohnson@uok.UUCP (11/20/83)
#N:uok:500005:000:1357 uok!wjohnson Nov 9 16:43:00 1983 I own a 1982 Chev Camaro Z28 with the Cross-Fire injection 5.0 litre engine. I am quite pleased with just about everything on the car except the engine. Ever since I first bought it (new) it has had a strange but quite noticable hesitation. Whenever I increase the throttle, it responds correctly for about a half second, then really bogs down. When floored, it doesn't show the hesitation, but overall performance is not what it should be (approaching 10 sec. 0-60). When the engine is dead cold, it responds perfectly. As it begins to warm up, the hesitation appears. It persists at running temperature. The best diagnosis I have attained says that it is simply running too lean. But I can't find any way of adjusting the mixture! Everything seems to be unbreakably controled by the @!$?%! black box. I have spoken to a few people who own the same engine, and they have the same problem. I have taken it to my local dealer many times, to no avail. Is my diagnosis correct? If so, is there any way of adjusting mixture? If anyone has any solutions to suggest, I would greatly appreciate it. Please respond to this note, as my site does not support net mail. Or, if you wish, I would appreciate a letter at the address below. W. Carey Johnson, Jr. 1712 1/2 Denison Dr. Norman, OK 73069 [duke!uok!wjohnson]