95 Tahoe 4WD V8 5.7 having a few problems
Empresive
03-18-2010, 09:31 PM
Hello,
Can anyone help me out with a few problems im having with my 95 tahoe. First problem i have is with the fuel pressure regulator, im seeing signs of it going bad cause there seems to be gas in the oil which makes the oil seem to go up insead of down and the gas does seem go by more faster as well. I did notice after checking the air filter that in the middle wear the regulator is seems to smell like gas and even the air filter smells like gas and were the regulator is seems to be a little wet. Whats the best way for me to check the regulator to see if it has gone bad.
My Seconed problem are diffrent but i think one of my other problems is being cause by there regulator but im not sure. My tahoe has got more harder to get it going, like its takes more gas just to get it up to 65 or so, would this be caused by the regulator?
Last problem i have is with my steer, there is slop in the steer and has been since i bought it about 2 years ago and was wondering as well what would cause that also when turning left or right the steering seems more easyer making realy sharp turns and checked the tie rods and ball joints by jacking my front end up and trying to move the tires up/down and left/right but it didnt move would that be cause by wheel alignment?
Can anyone help me out with a few problems im having with my 95 tahoe. First problem i have is with the fuel pressure regulator, im seeing signs of it going bad cause there seems to be gas in the oil which makes the oil seem to go up insead of down and the gas does seem go by more faster as well. I did notice after checking the air filter that in the middle wear the regulator is seems to smell like gas and even the air filter smells like gas and were the regulator is seems to be a little wet. Whats the best way for me to check the regulator to see if it has gone bad.
My Seconed problem are diffrent but i think one of my other problems is being cause by there regulator but im not sure. My tahoe has got more harder to get it going, like its takes more gas just to get it up to 65 or so, would this be caused by the regulator?
Last problem i have is with my steer, there is slop in the steer and has been since i bought it about 2 years ago and was wondering as well what would cause that also when turning left or right the steering seems more easyer making realy sharp turns and checked the tie rods and ball joints by jacking my front end up and trying to move the tires up/down and left/right but it didnt move would that be cause by wheel alignment?
jdmccright
03-19-2010, 02:27 PM
A failing regulator won't cause gas to mix with the oil...failing piston rings do that. But I would also check to see if you're getting any coolant in the oil. Look at the underside of the oil filler cap and see if there is a chocolate-milk-like residue. If so, you may have leaking intake manifold gaskets or head gaskets. A leak-down test can usually point you to where it is coming from.
Since you have a TBI, you'll get a fuel smell from the whole filter assembly since the injectors are in the open air and spray straight down into the TB bores. But what you could do is remove the filter cover and turn the ignition to on to pressurize the system, then check for any leaks in the gaskets in the injector pod assembly. After that you can start the engine and observe the spray pattern of the injectors using a timing light to give you a stop-motion effect. Clogged injectors can dribble, have an uneven spray pattern, or not spray at all sometimes. It should be an even, conical spray pattern towards the bore walls.
The sluggish performance, missing, or rough idle could be due to vacuum leaks in the TBI base, clogged EGR valve, or stuck IAC valve. Spray carb cleaner around the TBI assembly base gaskets and vacuum lines. If the engine stumbles, you've found a leak.
Finally, with the engine off have someone move the steering wheel while you look under the truck. It can also be the connection between the steering gear (the pitman arm) and the center connection to both tie rods. My truck is loose here, too. Also check the other arm (the idler arm...looks like the pitman arm but bolted to the frame on the psgr side) for excessive play. Wear and looseness on one side usually causes accelerated wear on the other.
Hope this helps!
Since you have a TBI, you'll get a fuel smell from the whole filter assembly since the injectors are in the open air and spray straight down into the TB bores. But what you could do is remove the filter cover and turn the ignition to on to pressurize the system, then check for any leaks in the gaskets in the injector pod assembly. After that you can start the engine and observe the spray pattern of the injectors using a timing light to give you a stop-motion effect. Clogged injectors can dribble, have an uneven spray pattern, or not spray at all sometimes. It should be an even, conical spray pattern towards the bore walls.
The sluggish performance, missing, or rough idle could be due to vacuum leaks in the TBI base, clogged EGR valve, or stuck IAC valve. Spray carb cleaner around the TBI assembly base gaskets and vacuum lines. If the engine stumbles, you've found a leak.
Finally, with the engine off have someone move the steering wheel while you look under the truck. It can also be the connection between the steering gear (the pitman arm) and the center connection to both tie rods. My truck is loose here, too. Also check the other arm (the idler arm...looks like the pitman arm but bolted to the frame on the psgr side) for excessive play. Wear and looseness on one side usually causes accelerated wear on the other.
Hope this helps!
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