I have a 1987 ford bronco 4x4 full size with 5.0. I replaced plugs, wires, cap, rotor,air filter,pcv,egr valve, idle air control valve, fuel tank, fuel pump, both catalytic converters. After replacing fuel tank, fuel pump in the tank and the catalytic converters it runs like absolute garbage only in drive. It bucks, sputters, and just no power. It ran great before replacing those parts.The reason for replacing EGR and catalytic converters was due to failed smog test.
Throttle position sensor
Sounds like a vacuum leak check around the manifold
SOURCE: Mirage Mitsubishi 2000 1.8L Rough Miss when Idle
Might want to look for vacuum leaks. Most misfires that go away with gas are caused by manifold vacuum leaks. The cat code can also be caused by the vac leak. There are different methods to find them and not real easy-but one way is to get a can of carb cleaner spray and spritz around intake areas. When the carb cleaner finds the leak--the car will run good for just and instant. Could be a rubber line or a manifold gasket. Hope it helped. Thanks
SOURCE: 87 chevy truck with TBI idles too fast
Spray the intake with carb cleaner to find the vacuum leak. Check where the EGR mounts and the throttle body gasket sense you had both off.
SOURCE: 98 blazer 4.3 4x4. runs very rough. scan code
ethanol gas problem. add a can of SEAFOAM to tank of Premium gas. change fuel filter after 100 miles. then add SEAFOAM 3-5000 miles to keep fuel line/system;emissions, and valves clean of ethanol goop and water which is created by this awful ethanol mixture.
SOURCE: I have a chevy silverado - 5.7 engine. It runs
Fuel Pressure/Pump?
Injectors?
Fuel Pressure Regulator?
Are there any codes/check engine light?
Ignition coil?
Just off the top of my head.
SOURCE: Real rough idle, looses power
Hi Spacey, Sounds as if you have an old model of the HiLux. Is it Carburetor or injection? If its carb I think that's where your problem will be. If there is leakage between the throttle body of the carb and the main body above it, there will be a flat spot when pulling away from start and possibly at higher revs. The easiest way of dealing with the problem is to replace the carburetor. Keep in mind that the most critical setting in any carb is the float level, if its not set correctly it will either flood or starve. Sounds as if you may have those measurements wrong. The settings are specific to the type of carb, if you need further help, tell me the type of unit fitted to your vehicle. Regards Johngee10
Here are the most common causes of idle surge, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake
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