Re: possible vacuum leak, need help

>
>> When my 2.2L engine is at operating temp I get a knock during >> accelleration, This does not occur with a cold engine. It sounds like >> the timing is off, but when I check it, the timing is where it needs to >> be.

Snip, your computer will flag up a rich condition on O2 sensor if your vacuum stuff is good and no air leaks, cooling up to snuff, good gas. Read the codes with key trick.

>All advance is handled by the engine control computer.

Even my 'van 1987 2.2L carb without carb & O2 feedback did have computer. But is primitive computer (not two modules) solely for spark control; advance mostly because of vacuum can on the 'puter box. Computer also does bit of emissions stuff and does have three terminal coolant sensor (had to dig for that one at canadian tire, got correct part for 1985 !!) for computer and gauge, and sets different advance schedules according to coolant temps. That is using correct thermostat (no burp hole drilled into thermstato please) and purging of air pockets, good cooling system are vital.

>> look. I have not been able to find any diagrams showing the vacuum >> system of a 1989 dodge aries. The car is in great shape and I want to >> keep it (mostly because I am cheap). But it still runs great. > >You really need to have the factory manual if you intend to keep a >warhorse running on the cheap. Go find the *factory* manual -- not a >Chilton or Haynes or any other aftermarket piece of junk. They go by >regularly on Ebay; put in this search string: > >(1989,89) (Dodge,Chrysler,Plymouth) (shop,service,workshop,repair) manual*

Agreed! This is how I got mine for 'van also.

Even if you strike out on Ebay and wind up buying the manual new at the >dealer, it will pay for itself the first time you use it.

Yes, already paid off on one look at my 'van and read through all service manuals I got off ebay and getting stuff to fix it up.

>DS

Cheers & Merry Christmas,

Wizard