0
When the vacuum from the engine sucks in Transmission Fluid from the bad modulator and shows up as heavy blue smoke out the exhaust.
Wiki User
∙ 7y ago
Add your answer:
Earn +20 pts
Is there a seal at the end of the vacuum modulator?
There should be an o-ring where the modulator is inserted into the transmission. There should be no fluid where the vacuum line attaches, if so the modulator is bad.
How do you tell if the modulator valve is bad on a 1993 Chevy S-10 Blazer?
If your car has one, take the vacuum line to the modulator off and if there is fluid inside, the modulator is bad.
What causes your Suburban 4X4's trans to lose fluid but not appear to be leaking anywhere?
the vacuum modulator can be bad. With the engine OFF, remove the vacuum line at the modulator. If fluid runs out, there's your problem.
What would cause transmission fluid to be found in the vacuum line connected to the heater control?
on some cars there is a automatic transmission modulator valve that tell by vacuum when to shift gears. If that valve goes bad you will get tranny fluid in your lines.
What does a bad modulator valve do?
If the transmission modulator valve is vacuum operated and it goes bad it can allow the engine to suck transmission fluid thru the engine causing the engine to blow blue smoke out the exhaust.
How do you know if your transmission modulator is bad on a 98 Mercury Mountaineer?
On a 1998 Mercury Mountaineer : The automatic transmissions are ELECTRONICALLY controlled , so there is no modulator
Why am i losing automatic transmission fluid but the outside of the transmission is dry?
You don't mention the year , so I'm wondering if your engine oil level is going up ? I'm not a mechanic / technician but I've heard that a bad transmission modulator valve can suck transmission fluid through the modulator vacuum line so it goes into the engine
How do you change the transvacumm modulator on a 1999 3.1 LS Monte Carlo?
The 1999 Monte Carlo has a 4T65E transmission that has no vacuum modulator, This transmission uses an EPC solenoid to control pressure, and commonly goes bad causing a harsh 1-2 upshift, pump whine and a check engine light with code P1811, max adapt.
When stepping on the gas why does it bog down on the 1987 2.9L ford ranger after having changed the fuel filter plugs plug wires Distributor coil rotor and air filter?
First check for vacuum leaks in the hoses, especially the hose going to the vacuum modulator on the distributor. Then check for a bad vacuum modulator. Other problems may be worn or bad valves, piston rings, or timing chain or timing gear wear.
How do you replace the EGR valve in a 1996 Lexus ES300 to resolve 'insufficient flow' and 'check engine' message?
P0401 "egr insufficient flow" can indicate many things, including: 1-vacuum line plugged or leaking 2-pipe from exhaust to egr valve plugged 3-pipe to vacuum modulator valve from egr valve plugged 4-passages at egr are plugged 5-bad egr valve 6-bad EGR VACUUM MODULATOR VALVE I tried cleaning egr modulator valve, (beside/above egr)removed and tested egr vacuum & movement, inspected and cleaned all vacuum lines openings and pipes. All above did not work. I replaced the egr vacuum modulator valve. Light went out without a reset in about 30 miles of driving. Not sure if this valve can be cleaned. Retails for $69.US
Why is my car burning too much transmission fluid?
pro bably the diesel leekedNot knowing what the vehicle is I would say the transmission vacuum modulator is bad.
Does the Modulator on a car have anything to do with the transmission of a car?
i know theres a modulator on a chevy th 400 tranny that can leak fluid bad and prevent it from shifting.Its on the transmission itself.
