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Hesitation on throttle after hard wheeling..

Dabba

Dabba

1/2 ton status
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Jul 27, 2007
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Long Island, New York
hey, i was wheeling really hard yesterday and after i was done i noticed my truck was hesitating when i hit the gas. Like its gonna stall but then it throttles up. Think the idle is a little low? Dosnt sound any different. Something had to get knocked around cause i was pounding the crap out of it. Thanks for any help guys. Also, any clue what a clunk could be when turning the wheel in the same spot? Looked under the truck at the front end, nothing appears lose and nothing came off yesterday wheeling haha. Thanks:bow:
 
not sure about the motor, but i always have to give mine a tuneup after wheeling hard. As far as the knock, it could be a crack in the frame by the steering box, or the spring/ shackle bushings are hammered. Have a friend sit in the drivers seat with the truck on and his foot on the brakes and steer back and forth in one spot (dry steer) and physically look for anything thats moving/ making noise.
 
all of that is possible. My rig sometime runs a little rough when it first gets off the trails. usually clears itself up on the drive home. A clunk when turning could be a busted frame, loose steering box, broken tie rod or drag link end, loose tie rod or drag link end, bad bushings or even a front u-joint that has lost its needle bearings.
 
The eratic idle and hesitation after hard wheeling may be fuel "vaporlock" (almost). After a day of wheeling your fuel level is low and the fuel is hot. Hot fuel expands and boils, this causes a lean mixture that misfires (hesitates).
Try to carry an extra 5 gas can next time you go wheeling, when the truck acts up add the 5 gal to the tank. If the problems dissapear it was vaporlock.
 
nah, wasnt vaporlock. Still have the problem. Think i may have found the cause, trucks making on odd noise on the passenger side of the engine bay, think it may be one of the peripherals... Ill have a picture soon.
 
Okay heres the picture...

080826_170854.jpg


It looks like that hose is missing a cap or something. I only know of the basic working of engines so youll have to forgive me. The hose runs into the block infront of the exhaust manafold and it connects to the peripheral below the alternator. Im not sure what it is, i was gonna guess water pump but looking it up im not so sure. I can tell you though that the hose is emitting warm air when the engines at temperature, and the peripheral below the alternator is making a sort of sputtering/clunking noise. The engine seems fine in neutral when you hit the gas, but when your in gear it seems to want to stall, and again, hesitates on the gas. Thanks, and sorry for exposising my ignorance heh:bow:
 
Carb rebuild time :D

Its happened to me many times, if you airfilter got wet at all then I can garentee that you have a tiny bit of water inside the carb or dirt build up.
 
oh yeah haha the dirts been like that before the issue, but last time was really sandy and there was alot of **** in the air.
 
The "peripheral" is your AIR pump. I wish I could help you more, but I have only seen one and it was in process of being removed by a hack!! From that "T" your pointing to, doesnt the hose run to a one way valve coming out of the exhaust manifold. If memory serves correctly, that "T" is where the drivers side tube would hook up. I would think that that hose being disconnected could cause rough running, but am unsure 'cause I dont really know how it works. I think it would cause symptoms of vac. leak 'cause it is drawing fresh air instead of exhuast. With truck warmed up, put finger or otherwise plug hole and see if condition improves. On a slightly related note, new properly routed spark plug wires along with a tune up could help. Sorry for the novel, but hope this helps.
 
Well the AIR system in the truck has been removed since i had her. So i guess that coudlnt be the problem. Still hear the noise from that area though and that peice looks like something was attached due to lack of dirt. Or capped. I did try to plug it with my finger with no sucess. It pumps out warm air and makes another noise i dont reconize so im pretty sure it was capped or hooked up to something despite the system being discconected. I guess when i have time i could try looking at the fuel filter and taking a look to see if the carbs getting gas. Though im not good with carbs.
 
That would be cool to see. And kenny you're right. its there, the whole system isnt hooked up though. Theres that tube coming off the pump and going into what looks like the block in the front of the passenger side header, not onto the big opening on top of the header. For me that opening on the header is just open. I guess whoever ripped it off didnt want to deal with the belt.

In any case, driving home from the station today the problem seem to correct itself. So if it stays that way im just missing a tire (shredded the sidewall:()

I can also say i love this truck and probably will never part with it. Ive had the thing going over ruts doing about 20-30 with the front and rear bouncing off the ground and she still goes.
 
Are you talking about the 1 1/4 " hole made out of heat shield looking material? If so, that is where your TAC would hook up. it connected to the stock air cleaner with dryer-like hose. It would monitor incoming air temp. to reduce emissions? Anywasys, are you saying that the AIR is there but not connected back into system, or no belt to pump? If it corrected itself then it doesnt mattermuch, just curious. And it is always something isnt it!
 
What the hell is a "peripheral"
What your talkin about i think is the "smog pump"
What that does is pump air into the exhaust manifold. This technique is used to lower emmisions.
You can just cap that off. The warm air your actually feeling is exhaust. There is a check valve in the line so air can only be pushed in, not pushed out, but it is pulled open slightly by vacuum, emitting a small noise. When i removed my emissions stuff, i heard the noise too. I figured the check valve would work, but it didnt.



Dabba said:
Okay heres the picture...

080826_170854.jpg


It looks like that hose is missing a cap or something. I only know of the basic working of engines so youll have to forgive me. The hose runs into the block infront of the exhaust manafold and it connects to the peripheral below the alternator. Im not sure what it is, i was gonna guess water pump but looking it up im not so sure. I can tell you though that the hose is emitting warm air when the engines at temperature, and the peripheral below the alternator is making a sort of sputtering/clunking noise. The engine seems fine in neutral when you hit the gas, but when your in gear it seems to want to stall, and again, hesitates on the gas. Thanks, and sorry for exposising my ignorance heh:bow:
Click to expand...
 
I didnt see someone already explained it.
sorry
Here is what a smog pump looks like.
P7230514.jpg


You claim someone removed the smog system on your truck already?
That maybe so, I see in your pictures, there are 2 vacuum ports coming off the water neck. I had to remove those when i removed my system. Yours are already gone.

Also, if the smog pump is still there, and the belt is still running the smog pump, and ONLY the smog pump, i would cut that belt off!!!

Removing the smog pump cleans up the front of the truck really nicely, and makes it a ton easier to change a fuel pump if you need to.

This was my simple, cheap, and temporary fix the the exact noise i think your talking about.

You can see a large bolt, stuck into a large black hose, to cap off the port on the header (exhaust manifold)
P7280515.jpg
 
Yeah im talking about that hole in the heat sheilding. ITs just open. So yeah smog system i guess, not the Air system? The air pump system is hooked up to a smaller metal tube that enters just at the front of the passenger side headers. I didnt give removing the pump much though because it would take some effort and not looking at the belt in detail, i believe its serpentine so whoever gutted it didnt want to deal with what to do without the pump there.
 
The big hole, not he one that your finger is pointing to was part of the stock air cleaner housing and does nothing now. I am not an expert, but I dont think that the pump is driven with serp. From what Ive read and seen on here( I think) the half serp. also catches the alternator, and yours looks to be v belt. I was thinking that one of the emmisions experts would of chimed in by now, as I am am talking at the highest extent of my knowledge right now, which aint much. HoustonTX is right about cleaning the eng. compartment up, but I dont know about emissions in your area, although its obviously not working correctly now anyways.
 
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