I had simerlar problem with opel vectra which machanic said was fuel pump so replaced it and didnt work. Any how it turned out to be water in the fuel (it doesnt need to much) so i put 2 litres of methelated spirits and running good ever since. Hope this helps.
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You better find a different mechanic . Before calling a bad fuel pump ,did he do fuel pressure test ? Did he test the electrical circuit ? Did he check mass air flow sensor ,injectors , fuel regulator , engine senors ? How many miles on the vehicle , is the engine in good shape ? Timing chain ?
Air is more dense at lower temperatures so the cylinders fill better and there is some evidence increased humidity also helps engines to run better.
Replacing stuff in the vague hope it will provide a cure can be expensive and very frustrating and is no substitute for proper checks and replacing only what proves to be faulty.
New plugs won't improve matters if the spark is really weak and a new fuel pump is really money down the drain if the pressure regulator is faulty or the injectors aren't spraying properly or the carb has some blocked jets or if the oxygen sensor is sending the wrong information...
It is best practice to always start with the basics - engine condition, timing, compressions, cylinder leakage and so forth. Your description indicates the engine is short of fuel or fuel that it can use but could equally be caused by a restricted exhaust. I once had a car just like that and it was a worn exhaust cam lobe that was causing the trouble.
turn left, sputter, sputter, pop! sputter, sputter..............vvveeerrrooommm !? WTF? Crazy 91 Honda CRX just became a death car tryin to get through an intersection. Checked all my wires and ended up in the gas tank tryin to put the fuel pump back together. POS pump is in the left side of the tank!? So if you got a few miles on it the fuel pump screen can fall off. Turn left and the last 1/8th of a tank goes to the right leaving a 3/4 ton chevy in your girlfrends lap...well almost. I still got the CRX, the girl got droped off at the car wash cuz she smelled like poo.
First check your battery! The electronics for the fuel system can be affected if the current isn't correct. You can also check the fuel control module....94 & 95 models are notorious for having problems with them. Check the fuel pressure regulator...the distributor....spark plug wires....ignition module....fuel pump. I hope this helps. Good luck!
change your fuel filter and check the fuel pressure on the fuel pump you may have gotten some bad fuel try some STP gas treatment make sure you have a half tank of gas and add a little more go somewhere you can drive 55MPH give these websites a try www.alldatadiy.com and www.autozone.com wish you the best of luck Michigan Man.
sounds like a fuel pump problem,with fuel pumps u can have pressure but not enough volume,try goin up a steeper hill in 2nd gear and get about 3000 rpms on the engine and see if it really drops out bad and is really gutless,if that happens without a check engine light coming on it might be yur pump and u should also replace the fuel filter at the same time,hope this helps
Per your description, I would suspect a fuel pump issue. When the fuel pump is running the pump impeller heats up. On an older pump the impeller can begin to seize up and momentarily stops and starts. Some times it just stops and has to cool down for a couple of minutes, then is ok for a while.
To test this theory, when the engine stalls and stops, your mechanic can use a rubber mallet and hit the bottom of the gas tank, this will free the pump impeller and the car will start again.
Or, have him install a fuel pressure gauge and go for a drive. If the pressure begins to fluctuate and drop, you know the pump is causing the issue.
Good luck, let me know.