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Old 04-13-2015, 06:15 PM   #1
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Smile lost of power chevy g 30

hello am the owner of a school bus 1991 chevrolet g30 gasoline engine 5.7 8 cyl Automatic lately has lost much strength I thought the solution was to make the full service engine oil filters air gas but nothing at last the hills rises more lows that are very difficult with students or not and de miles /gas is horrible I hope you can help

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Old 04-13-2015, 09:48 PM   #2
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Funny how you managed to fit all that in one sentence. Were you asking what color the inside of the tires are? J/K.
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Old 04-13-2015, 09:51 PM   #3
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Pull your distributor cap + check inside. Make sure the center carbon plug (goes to the coil above it) isn't burned.
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Old 04-13-2015, 10:41 PM   #4
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forgiveness try to say everything or explain the best way
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Old 04-13-2015, 10:44 PM   #5
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thank you very much I will review what else is that gasoline smell is strong
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Old 04-14-2015, 12:20 AM   #6
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Sounds like either the choke on the carburetor is stuck or you have a waterlogged float in the carburetor. When they changed the fuel filter they got it in in the right direction and they didn't lose the spring that holds it in the housing. You might take the air cleaner top off and look down the carburetor and see if it is dripping gasoline, if it is then you could have debris in the needle and seat or the sinking float. HTH
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Old 04-14-2015, 12:22 AM   #7
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Sorry forgot to ask if this is carburetor or fuel injection?
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Old 04-14-2015, 10:26 AM   #8
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thanks for the reply is tvi before service had no strength and smelled exhaust fuel and the mixture was very hard to make the service took off at first but few after days lost force the hills not upload a hard time and fuel consumption is horrible what you say I 'll check it sounds great thanks
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Old 04-14-2015, 10:28 AM   #9
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Sounds like you should rebuild your injector pod. They are known for bad diaphrams in the fuel psi regulator.
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Old 04-14-2015, 10:46 AM   #10
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thanks for the advice
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Old 04-14-2015, 11:23 AM   #11
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if it is tbi, check that the wires going to the injectors are not burnt (from back fires)

it sounds like one is sticking open and dripping gas into the intake, and fouling plugs with too wet of a mixture

with engine idling look into throttle body, slowly rev engine by hand (DO NOT HAVE YOUR FACE DIRECTLY OVER THE OPENING) AND SEE IF YOU CAN SEE

1)dripping gas
2)a fine mist being sprayed

report back
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Old 04-14-2015, 02:09 PM   #12
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Check the wires to the TBI that they are not pinched between the air cleaner and the TBI body also check that you have a good vacuum hose hooked up to the MAP sensor
no vacuum leaks. If you have a VOM available you should do a sweep of the TPS and also check the resistance of both the injectors. HTH
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Old 04-14-2015, 06:22 PM   #13
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Quote:
Originally Posted by Dragonpop View Post
Check the wires to the TBI that they are not pinched between the air cleaner and the TBI body also check that you have a good vacuum hose hooked up to the MAP sensor
no vacuum leaks. If you have a VOM available you should do a sweep of the TPS and also check the resistance of both the injectors. HTH
thank you all for your tips are real good and help me a lot today came the mechanical and apparently several things happened here in Guatemala there are places where they perform services for fast that was done take the bus n principle the employee leave misplaced the wires one or burn candles because bumped into the exhaust and rotor is bad and I was working on 5 cylinders 'll have to buy those parts are saying some other tips
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Old 04-14-2015, 06:39 PM   #14
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What translator do you use for internet? Curious

I hope it fixes your problems
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