Question about 1984 GMC K2500

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When I give it a little gas the RPMs gradually increace on its own unless I rev the engine. Im lost

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Suspect a weak throttle spring and maybe binding in the linkage somewhere. Check the foot-pedal bearing point for friction. Make sure the carburetor mounting bolts/nuts are tight along with the carburetor body screws. Check for leaking vacuum lines from the intake manifold and the carburetor.

Posted on Sep 26, 2009

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The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

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My truck wont start unless i prime the carborator first, then it wont stay running unless i rev it high just before i put it in gear, or im accellerating...


To start with, you have a throttle body instead of a carburetor.
On that throttle body is a component called an air control valve.
That valve is how the computer controls the idle speed. It should open and close the air flow into the intake manifold as needed.
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Why does my 09' cobalt lt bog out when I floor it


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My 1992 sonoma started spuddering after I had the fuel pump, screen, and filter replaced on it. It started off a few seconds of it, gradually increased to 20 sec, then a min or two. Now it just runs bad...


First I would check the air filter, then clean the throttle body, use brake clean and a small brush, clean the opening and open the throttle plate and clean as much as possible on the back of the plate and down in the throttle. start the engine and rev up, spray the brake clean in the throttle, you don't have to use all of it. also do you have a check engine light?

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1 Answer

98 dodge ram 5.2l 4x4. Trans/Idle problems.


It won't shift 1-2 or 2-3 or both unless you let off? If it is just 1-2 it might be a band adjustment, but I'll bet you have a plugged governor solenoid screen also.

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Engine light is on, revs to over 8000 RPM ... check gas cap as instructed by owner guide and said to drive 3 days and it should shut off .. now rev'ing over 8000 RPM


not a good situation! could blow your engine!! take it to a qualified honda dealer, and have them run code check on it- may be 'tps'- throttle position sensor. the code read may cost more than the fix! however, 8k rpms aren't healthy for your engine- so, check and fix may be cheaper than replacing engine! could also be your fuel vapor recovery canister is 'over -loaded', but unlikely!
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We had the same problem and found it was the fuel pressure regulator. Upon replacing it no longer gives any hesitation at startup.

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