Ask Experts Questions for FREE Help !
Ask
    Feedandseed's Avatar
    Feedandseed Posts: 38, Reputation: 1
    Junior Member
    		  
    #1

    Mar 29, 2011, 12:14 PM
    Engine reving out of control when clutch is dropped
    I have a 1992 mazda b2200. I have two problems, most likely stemming from my attempts to fix the truck myself. First off...

    I replaced the gasket on the oil valve cover, it had been leaking oil onto the spark plugs. Now I believe I have a vacuum leak. Is using started fluid a reasonable method for finding the leak(s).

    Off and on for a year now the engine has been revving very high when I have my foot on the clutch but the gear is still in place. If I put the truck in neutral (when waiting for a light or coasting) the engine goes down to its normal idle, (which at this point is not so awesome either). If the gear is engaged the revving is a non issue as the motor has a load. What am I looking at?

    Has my ambition destroyed my truck? Is it time to start sitting on my hands? I've got too much free time to feel good about sending my baby to the shop...
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #2

    Mar 29, 2011, 12:21 PM

    Starter fluid is way too explosive to use to find vacuum leaks. Instead, use a can of spray brake cleaner or, preferably, propane. Remove the head from a propane torch and attach a length of tubing.

    Look into how to set the idle speed, when the truck is at normal operating temperature--likely 700 rpm. You may want to clean the throttle plate, throttle body, and Idle Air Control Valve (IACV). It should be similar to the process described below:

    https://www.askmehelpdesk.com/cars-t...ml#post1054149
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Craftsman lawn tractor engine dies when clutch disengaged [ 2 Answers ]

It starts up just fine. The mower blades are not engaged... but when I let up on the clutch/brake, the engine dies - even when it's in neutral. What is wrong with it?

Sears riding mower engine dies when trying to engage clutch or blade [ 1 Answers ]

I am trying to help a friend T/S his Sears 16 hp Riding Mower. It dies when blade or clutch pedal is engaged. I have removed, cleaned and ohms-checked all safety switches, including seat switch but engine will start fine and run fine until I try to engage clutch or blade. Even ohms-checked...

JD 160 Engine Shuts OFF & Clutch Will Not Engage [ 2 Answers ]

I have been using the mower for a while now. I replaced the battery for a regular 12V car battery. The mower starts fine but when I move the switch to get the blades spinning, the engine stops. Do you think I need a new clutch? Do you think the Battery is too powerful? Thanks for your help...

Engaging the Attachment Clutch on my Craftsman Mower kills the engine! [ 4 Answers ]

I just got a brand new Craftsman lawn tractor, delivered this morning, already assembled even. I read the manual, more than once, filled the gas, checked the oil, checked the tire pressure, did everything I was directed to do. Started up fine and I let it warm up. But whenever I try to engage...

Pto clutch wires cut, fuse blown, engine still doesn't turn over [ 2 Answers ]

I have a troy-bilt 14 hp ltx lawn tractor. While turning off the pto switch, noise followed, then mower shut off... discovered the black/white wire to pto clutch was severed and the plug pulled out... the 30 amp fuse was also blown at the ignition switch.. I spliced the wires and plugged back in...

View more questions Search