In Reply to: '87 535i, a couple of questions posted by Mat on January 29, 2001 at 11:11:30:
About your starting, it doesn't sound too bad. A few seconds, as in 3, is fine, IMHO, however if it's 15 seconds that's too long. Long crank time could be a sign of an injector leaking, which reduces the fuel pressure in a stopped engine, which has to build up again while cranking. Long crank could also be a non working cold start valve, but in this case stuck closed, not open.
Hello. I bought a 1987 535i about four months ago and the car in great. I could not imagine how driving could be so much fun.
I have a couple of questions about the car. First, the fuel consumption. At the moment, the car takes about 13-14l./100km and I would like to know what the average consumption is for these cars. I have to say that I have a Dinan chip, so I don't know if it raises the fuel consumption.
Also, when it's cold in the morning, the first time I start the car, it always takes a few seconds before the engine starts (sometimes, a long few seconds, especially when it is very cold). But, the car always starts and after, there is no problem for the rest of the day. As I read the tread about fuel consumption, I was wondering if it could be related to the cold start valve. Some people said that a broken cold start valve could be the cause of excessive fuel consumption (assuming I have such a problem) and, by deduction, I'm wondering if it could also be the cause of the "troubles" I have in the morning.
Thanks for your help, hope my english was clear enough.