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1990 fuel pressure 4.3 chevy Pu throttle body 2whl dr 2 wheel dr Cheyenne 1500

I invented a Fuel-Expander i call the Grice Device spd ometternot work but aman with samePu as mine said he got 19 mpg hwy i installed a Grice Device my Pu got 24.1 mpg look scnow.comgricedevice when page come up read Grice Device can help streatch miles per gallon? I had a 81 Datson straight 6cyl FE it was 19 mpg hwy i put my Device on it got 29 MPG then i add regulator it was 19lbs preasure i cut it down to 4.5 and cut fuel-flow got 60 MPG

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Posted on Jan 02, 2017

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SOURCE: Gas Consumption

i have never seen this before but if it was not operating properly you would a check engine light on

Posted on Jul 02, 2008

  • 7 Answers

SOURCE: Accelerator flat spot between 2-3K rpm

The shop quote could be correct about insufficient fuel (lean) condition. If this exists it causes the driver to push harder on the accelerator (more fuel) to "make up" for the lean condition thereby causing your truck to use more fuel and lose gas mileage.
I recommend looking for a vacuum leak at the carb base, intake manifold, vacuum lines or the power brake booster. Try to use (borrow) an external vacuum gauge during testing. It should read between 17-20 inches of mercury during normal idle.
Has the Toy had the flat spot as long as you have owned\driven it? If so the carb might need to be re-jetted especially if it is being used at a different altitude then what it was set-up for.
Hope this helps.

Posted on Apr 26, 2009

  • 45 Answers

SOURCE: Where is the Fuel Pressure Regulator on a 1996

on the fuel injector line

Posted on Jun 30, 2009

66 chrgr
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SOURCE: My 2006 PT 2.4 Turbo PT Cruiser gets 15 mpg on the highway when it's supposed to get 22 to 24 mpg.

My pt gets only 16 to 18 miles per gallon.check your air filter.

Posted on Jul 31, 2009

  • 94 Answers

SOURCE: poor fuel milage on a 1993 chevy 1500 with a 4.3

check your timming, it sounds like its out of adj.

Posted on Jan 15, 2010

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SKM, fuel pressure regulator is on top of throttle body. This could be the problem, could also be vacuum leak, faulty EGR, etc. You may want a good Tech, to diagnose and estimate repair. Check the attached links,instruction and guides, Good luck
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1996 chevy 1500 4wd pu. cuts out on accel. and hesitates, hard to shift, and poor gas mileage. any help?

Check the TPS, (throttle position sensor), and the fuel pressure. If it is a TBI model the fuel pressure should be 6-12psi. If it is a MPI injection system the pressure should be about 55-65psi.

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My 1994 chevy p/u 1500 V6 chuggs when trying to start and it never completely starts

Will it start on starting fluid sprayed into the throttle body ?
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1990 chevy 1500. starts, runs, when warm it floods, fuel injectors, how can i keep the choke open

If you have a choke on a 1990 1500 ,something is really wrong.I have never seen a choke on a throttle body.If you don`t have fuel check your fuel pump.

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I have a 1990 Chevy 1500. Have replaced fuel-pump already and it ran great. Now it wont start again. Fuel-pump works, but injectors in throttle-body not injecting fuel. What would cause this?

Leak in fuel line. Put air pressure gauge on rail and crank engine. Should get psi reading. There should be a nipple on fuel rail for testing. If no pressure check for leak

Dec 28, 2012 | Cars & Trucks

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5.3 chevy hesitates when cold runs fine after warming up

what is the fuel pressure reading, sounds like low fuel pressure, you should have 60 PSI at idle and more when you throttle the engine up about 65 PSI, it should NEVER go down.

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1990 chevy blazer 4.3 no fuel going to throttle body. Cannot hear very well so do not know if anything is kicking on. was wondering where the regulator and the fuse is that runs the fuel pump.

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