My 1998 ford expolrer runs rough when i first start it but smooths out after a few minutes yet the idle is so low that i have to give it gas just to stay running. I put a new fuel filter on as well as spark plugs and wires.a firend of mine from minekie said i had a blown head gasket which he said would run me $1200 or more. but i dont see my oil as milky white i do hope some of you guys can help me. oh yes i also put a new mass air flow sensor on it. one more thing the catylictic convertor dose get very hot, so hot it looks red... please help
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This car doesn't have coils and wires, it's gasoil. The most likely reason is the piezo injectors are worn. The best way to test is with VCDS After an overnight stationary period drive the vehicle with cold engine between 1200 - 1600 rpm till the complaint occurs. Constantly read the measured value block 13 and 14 for the smooth running control in the engine control unit. The values of one or several cylinders should noticeably move to positive.
modified injectors A8: with 3.0l, 4.2l TDI from: WAUZZZ4E*7N016685 Replace the injector with the highest deviation and all injectors produced between 1.3.2006 and 30.4.2006. Example of production date: 060304 stands for 4.3.2006 vcds go to address 01 measured values below 013 Smooth running control1)Cyl. 1 Injection quantity variation[mg/stroke]2)Cyl. 2 Injection quantity variation[mg/stroke]3)Cyl. 3 Injection quantity variation[mg/stroke]4) VacantPermissible values at idle: +- 2,99 mg/strokeA If the permissible tolerance is exceededfirst check injector IQA-IVA adaption values 014 Smooth running control1)Cyl. 4 Injection quantity variation[mg/stroke]2)Cyl. 5 Injection quantity variation[mg/stroke]3)Cyl. 6 Injection quantity variation[mg/stroke]4) VacantPermissible values at idle: +- 2,99 mg/strokeA If the permissible tolerance is exceededfirst check injector IQA-IVA adaption values
I have a 1998 Mazda B2500 (same truck/engine/trans). A few years back, I was getting a rough idle a few minutes after startup, and my tachometer would fluctuate wildly. This progressed to the point where I was stalling out randomly while driving. With the help of my local mechanic, I ended up diagnosing it as a mass airflow sensor error. My best guess is that oil or water had gotten into the intake. Whatever the cause, after replacing the sensor (saw them for $60 on eBay, right after I paid $300), it's been running smoothly since.
P.S. -- I don't think this is a mileage/wear and tear issue so much as it is bad luck. I only had 13k miles on the truck at the time.
what do you mean by "as if the idle is too low", does the car start normally but then idle at less than 750 rpms? or idle rough? If either of these is the case it could be bad gas, fuel injectors or fuel pump. As far as the odor, do you every see any fluid if you look under the car? A punctured fuel line would be rare but would fit all your symptoms. hope this helps :)