Tag Archives: Throttle Body

The throttle body on newer cars and trucks is electronicaly controlled. Read our questions and answers for starting and idle problems.


Ford Trucks Throttle Body Bad- Won’t Start

Hello I have a 2006 Ford Explorer XLT. It has about a hundred and fifteen thousand miles on it. The Saturday before Christmas I pulled out of my driveway and drove maybe half a mile and then the wrench light came on so I pulled over and as soon as I came to a complete…

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1998 Honda Civic Runs Bad- Code P0172 Fuel Trim Rich Bank 1

Live Chat: 1998 Honda Civic LX D16Y7 195k Automatic. Initially had a rough/surging idle problem, cleaned throttle body, injectors are good, new spark plugs, IAC valve good. Car idles fine but running conditions are crap. Loses power at seemingly random times. Finally ran diagnostic tool and came back with P0172 System Too Rich (Bank .1).…

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2009 Chevy Impala Engine Light And Reduced Power

2009 Chevrolet Impala won’t seem to have any pick up says reduced engine power on dash. Have you noticed if the check engine light is on as well the ‘reduced engine power’ message on the driver information center? Yes it is on all the time but was on before I have this problem. Well you…

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2002 Pontiac Montana Cuts Off At Higher RPM’s

2002 Pontiac Montana 3.4L OHV had oxygen sensor code but replaced it and cleared. Head gaskets were leaking as well so replaced (milled heads, pressure tested, valve job, replaced 4 bent intake valves), also replaced plugs, wires, coils and ignition module and O2 sensor, cleaned throttle body. Car cuts out at a specific RPM in…

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1997 GMC Sierra Engine Light And Idle Surge

MY 1997 GMC SIERRA W/350 V8 HAS A DEAD CYLINDER ON #4. SPARK PLUG IS GOOD, WIRE IS GOOD DISTRIBUTOR CAP IS GOOD. WHAT ELSE COULD BE CAUSING THIS DEAD CYLINDER ? TRUCK HAS 117,000 WELL CARED FOR MILES ! ProTech: Have you tried a compression test? Not yet, but a compression test was next…

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2001 Chevrolet Silverado Cranks But Will Not Start

My 2001 Chevy will not start. I replaced the fuel filter and I can hear the fuel pump running. Could it still be the fuel pump? Mechanic JK: What model Chevrolet is this? Any warning lights on the dash? Sorry, it’s a Silverado. No lights, and the diagnostic tool shows nothing. OK. Most likely not…

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1994 Ford F-250 Engine Light and Idle Problem

My 1994 Ford F-250 with a 5.8 Gas engine refuses to idle below 1500rpm. Is this a common problem in older engines and what might be causing the problem? I have a 15gpm hydraulic pump attached on a clutch pump, but the over revving is a fairly recent problem. ProTech: I’d first check for any…

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1994 Buick Century P0341 Cam Sensor Code

I have a 1994 Buick Century v6 3.1 and im having 2 main problems. My first problem is I replaced the crank and cam sensors awhile ago and while everything went fine with the crank im having some problems with the cam sensor. When I got the new one in it gave me a P0341…

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2002 Chevy Trailblazer Dies Out

My 2002 Chevrolet Trailblazer stalls when sitting at a red light but not all the time,rpms go up then drop to 200 and car cuts off,already cleaned throttle body,changed fuel filter,changed map sensor,changed exhaust cam actuator solenoid and still stalls,any ideas would be greatly appreciated! ProTech: Is the check engine light on at all when…

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2003 Chevy Silverado Check Engine Light and Transmission Slipping

What is the cause of reduced engine power? ProTech: What year, make and model of vehicle? 2003 Chevy Silverado 1500hd 6.0 engine. Is the check engine light on as well? Most times there has been a failure on a computer controlled component that has set the check engine light on, and that will usually cause…

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Reduced Engine Power Warning And Check Engine Light

The reduced engine power warning message can come on your car or truck. Today’s vehicles are for the most part completely electronically controlled. From every button and switch on the dash down to the ‘fly-by-wire’ throttle control system. Back in the day, before these electronically controlled throttles, everything was cable actuated. You press the gas…

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Chevrolet Camaro Engine Light And Lean Codes

So, today I had an older model Camaro, 2001, high mileage, and not very well maintained.  It came in with the check engine light on, and had codes stored for the fuel trim being lean. Specifically, a P0174 Fuel Trim Lean Bank 2 code. This was surprising as while watching the info on the Tech…

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