1987 760 Turbo No-start

brandon7219 · Post by **brandon7219** » 07 Apr 2016, 16:25

Hey all, Im having a problem with my 760.

The car has been sitting parked for about 9 months now. I started it up once or twice when i remembered to. Then back in December I think? I tried starting it up again and it needed a jump. The battery itself was AT LEAST six years old if not older. I let it sit for 30-45 minutes and shut it off, thinking that was good enough.

Jump to today, Im leaving on a couple month trip and wanted the wife to have a second vehicle for an 'emergency situation/ just in case'. So i decided to go and get a new battery. Installed the new one and went to turn the car on.

Now the car cranks and the belts are moving, sounds like a normal cranking to me. However the car will not start. I thought maybe this battery needs some extra juice and tried jumping it. Same thing.

Im guessing *hoping* maybe its the fuel? 9 months of sitting? I've been thinging about going back out to get a syphon pump and pumping out the gas, replacing it with a couple gallons of new stuff.

Any ideas would be great. THank you

lummert · Post by **lummert** » 07 Apr 2016, 21:24

The ethanol in the fuel has settled by now.

brandon7219 · Post by **brandon7219** » 08 Apr 2016, 12:28

Well i figured it out. really stupid silly and a huge overlook after battery install on my part. I went around checking lines/hoses, filled up liquids that needed filling (oil, antifreeze, power steering). Still nothing worked

It was that Bosch ignition module plug thats right next to the battery. I must have hit it and unplugged it on install. I noticed it today when i went out to check the igniters. when the igniters checked good i went to hook up the Negative side of the battery and saw that plug just dangling. Hooked it back up and the car started right up.

93Regina · Post by **93Regina** » 08 Apr 2016, 19:42

brandon7219 wrote:Well i figured it out.

Leaving a vehicle parked in a garage, it can sit for longer periods without gas/alcohol separation. But, if not run periodically, injectors have been known to gum up, and stay closed.

It is well known that "The storage and stability of ethanol blends are special issues due to ethanol’s affinity for water and the risk of phase separation."

I have a vehicle that has been sitting several years in a machine shed, and so far no issues; but every several months, it is started/driven.

Leaving a vehicle parked outside for months, on an empty tank, is asking for trouble.