I've got a '93 Mercury Cougar and it seems to want to stall a lot. The first time it happened, I was at a stop light, and the lights i had to wait for before it, it seemed the car hesitated when i pushed on the gas pedal. At the stop light, it just stopped completely, the engine light came on, and i was able to slowly pull to the side of the road with everyone honking their horns behind me. Now, i continue to worry it will happen again as it has already happened once after that while i was going slowly in reverse in my driveway. I now don't completely stop when i go to a stop light, but slow a lot down so i can hope it turns green. My friend told me something like this happened to him and it was carbon getting stuck in his EGR valve. Does anyone know if this could be the simple problem, or is it something else?
2007-06-04 14:59:02 · 10 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
Also, we've already changed the fuel filter and that was before it stalled while in reverse. Plus before it first happened, i just had the vent on low and my radio wasn't blaring music, so everything seemed to be normal.
2007-06-04 15:15:10 · update #1
Many good suggestions. You should start with the simple stuff like cleaning the throat of your throttle body or air intake before and after the large metal flap. I have seen enough sludge build up in these to stall or nealry stall the motor at idle. When you accelerate it seems OK but at idel it nealry dies or idles very rough. The oil vapor gets sucked into the PCV valve and cools in the throttle body and solidifies into black goop. Make sure you use a cleaner specifically for fuel injected cars. The old carburetor cleaner will melt or damage some of the electrical stuff (sensors) inside.
It does happen form time to time the EGR valve gets stuck open with a small "chunk" of carbon that breaks off of the intake manifold and goes through combustion and gets blown into the EGR gas passage. The long and the short of this fix is you either keep taking the EGR valve off every time this happens and put it back on or you pull off the intake manifold and have it professionally cleaned (hot tanked) at a machine shop and then put it back on.
The older vacuum operated EGR valves can usually be cleaned and put back on without too much reoccurance. They do have to be replaced at times since the hot gasses and small carbon chunks can eventually erode the valve or the vacuum "motor" gets a hole in it and the valve stays closed most or all of the time.
Some of you symptoms are similar to a dying fuel pump so don't jump into the big money projects until you rule this out. My car likes the Winter blend fuels over the Summer blends and my fuel pump has threatened to die on me by making some loud whizzing noises but when I fueled up days later it was happy again. Some stations sell a high methanol content fuel and older fuel pumps don't like this as it offers less lubrication of the internal bearings inside the electric pump that is literally swimming in your gasoline tank.
2007-06-04 15:34:07 · answer #1 · answered by CactiJoe 7 · 1⤊ 0⤋
it actually could be that ,the egr valve will stop up and cause this,also a dirty gas filter will do it ,even an air filter will cause this,but all of those things you can check out fairly easy the egr valve can be took off and cleaned out,and that will pretty well help it,the rest you can replace like the gas filter,there's other things that can cause this also,like a set of spark plugs that have a lot of miles on them,this is some of the stuff you can check though,id try the egr valve first,your friend might be right on it with this one,good luck on it.
2007-06-04 15:08:03 · answer #2 · answered by dodge man 7 · 0⤊ 0⤋
I would look at either the fuel filter, fuel pump or pcv valve. It sound like a fuel system problem, If it does it while you accelerate then it could be your coil or rotor. Sometimes if your coil shorts, or the coil module, it can cause a plug not to fire causing fuel to build up in the cylinders and bypassing.
You can also look at the throttle position sensor if its out of adjustment it can give you those kind of problems..
2007-06-04 15:08:08 · answer #3 · answered by risner552004 2 · 0⤊ 0⤋
EGR valve or the Fuel Pressure Regulator.
2007-06-04 16:36:03 · answer #4 · answered by Abel H 5 · 0⤊ 0⤋
My hubby is a mechanic he said get a can of carbon choke cleaner and spray it into the throttle body and take a small wire brush and clean the butterfly make sure you hit all the sensor points then give it 15 mins before cranking give it a try and then if that dont work email me at blondebabe304392001@yahoo.com
2007-06-04 15:04:19 · answer #5 · answered by Tina C 2 · 1⤊ 0⤋
Could be the fuel pump. Could be a bad connection to the battery (lights might be flickering on the dash). Could be the fuel filter (pretty easy and cheap to change). Those are where I would start. Not in any particular order. Hope this helps. Good luck.
2016-05-17 03:48:10 · answer #6 · answered by ? 3 · 0⤊ 0⤋
Sounds like the MAF sensor. Spray through the throttle body with carb cleaner as mentioned above! Good luck!
2007-06-04 15:13:29 · answer #7 · answered by Anonymous · 0⤊ 0⤋
time for a fuel pump
2007-06-04 15:08:10 · answer #8 · answered by Mike M 1 · 0⤊ 0⤋
try to keep the engine reved a bit so it dosnt stall
2007-06-04 15:02:36 · answer #9 · answered by Anonymous · 0⤊ 2⤋
maybe you should change your oil equipment
2007-06-04 15:06:39 · answer #10 · answered by car s 2 · 0⤊ 0⤋