1991 Cadillac DeVille "vaccuum modulator" Questions

1991 cadillac will not shift up to drive or over drive ??? 2 trannys same problem You need vaccuum to the modulator for that. or new modulator.

maf sensor and throttle body has been cleaned. idle control module has been replaced no vaccuum leaks. is it poss for this idle speed to be caused by o2 sensor. when idle control module blanked off id

...no reason. If you turn key off it will crank. Have replaced massive air flow meter, oxygen sensor, vaccuum pump and most all hoses and vaccuum valve. It will die going 55 down road or at a stop

rebuilt tran want shift to first at a stop unless done manually any help would be great rebuilt trans maybe shift cable out of adjustment? or vaccuum modulator

vaccuum hose is connected to manifold however no suction to brake booster 2005 ford f150 Need vacuum line diagram for 2005 ford f150 or need to know what module could be bad. there is a tear in the ...

...MAP sensor located on my 1995 nissan pickup? look to the left of the air filter for a module with 1 vaccuum hose and three wires. It may be labled as a boost sensor. I had a 97 XE and that's where ...

...vaccuum operated valve called a modulator valve that controls the firmness of your shift.less vaccuum the harder the shift. a simple flush and tune will most likely fix your problem. just give her a ...

...1993 GMC 3/4 ton with a 350 engine. I changed the EGR valve and the electric module that feeds the vaccuum line to the EGR valve from the carb. No difference. The double wire that clips to the

...vaccuum line to the modulator and fluid came out. Is the modulator bad or malfuntioning due to the fluid level? you should not have fluid in vaccum hose .mod.valve diaphragm is probablyruptured. ...

...timing might be a little off...she does hesitate when I take off from a stop....but I also found a vaccuum line with an open end and Im not sure where that goes...I checked the cruise control ...