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Clean dirty fuel injectors on TBI 5.7L 1988 Chevy P/U

Can I clean dirty fuel injectors on 1988 Chevy TBI 5.7L with a fuel additive?

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  • Hyundai Master
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Yes you can

Posted on Jul 21, 2010

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Posted on Jan 02, 2017

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Trouble troubleshooting


Dirty fuel filter, clogged injector(s) water in fuel, dirty air filter. try fuel additive to clean injectors and remove water. replace air filter, fuel filter. possible could be the injector pump, would have to do a pressure check on fuel rail.

Aug 14, 2014 | Cars & Trucks

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Injector not fireing


you have a TBI 8valve engine. just like my 91
the injector , not firing, so by guy method.
1: it dont click? (sonic ,stethoscope)
2: the noid dont flash. (use a noid lamp and win)
3: it dont squirte, watching it with eyes, cranking,

if the noid fails, that means ECU is bad or one of 3 inputs to ECU are dead.
if noid works, that means, the injector is cogged, it has 10 micron screens that are easy to clean. or there is no 35 PSI fuel pressure.

here is the page just for that.
  1. THE ECU IS PROGRAMMED to cut fuel if there is no spark preventing TV like crashes and burns. (and other fire reasons)
  2. the tests are all easy. no order but #1 is #1
  3. fuel pressure at spec.
  4. injector coil reads 1.0 OHMS.
  5. injector clean. (there is only one, so all hope is just here)
  6. noid lamp fails , so is CMP dead? or TPS TP pin stuck high or , ecu throwing code 41./42s errors, BINGO!

http://www.fixkick.com/INJECTORS/injectors.html

or no starts

http://www.fixkick.com/INJECTORS/injectors.html

May 06, 2014 | 1992 Geo Tracker

1 Answer

I have a 1995 chevy k 1500 350 tbi it hesitates when trying to accelerate changed plugs wires cap and rotor it dose have aftermarket tbi and performance intake it dose it hot or cold thanks


hesitation with TBI is sometimes a dirty Injector, make sure you have a good fan pattern on the injector and make sure its responcive. use a nylon wire brush to clean the tip, and alot of carb cleaner, also make sure that your butterfly moves freely, they tend to get gue/carbon build up on them and this will also cause a hesitation

Sep 22, 2011 | 1995 Chevrolet K1500

2 Answers

My 1998 Chevy Blazer crank excessively when I try to start it. It always starts, and runs good when I get it started, but I would really like a smooth start. I have recently changed the fuel filter, spark...


leaky injector/s is flooding motor, mechanically clean or replace. And clean throttle body while you are at it with spray cleaner. Should be almost spotless where large throttle valve opens and closes.

Oct 21, 2010 | 1998 Chevrolet Blazer

1 Answer

1995 chevy silverado 350 TBI V8 standard powerloss


have you checked the filter, i know you state the fuel lines are clear though. likely fuel injectors have lost flow. the TBI injectors can be cleaned, but i usually just replace them. but check them using a timing light hooked to the coil wire for timing of each injector spray. the pattern under the light should be even and conical shape, no major spatter. if one shows low volume, the other one should be replaced at same time, it will save you having to change it when you put brand new next to old one a have same problem again. only replace with brand new, i've had 7 bad remanufactured injectors on one truck at one point in time, only replace with new!

Jul 08, 2010 | Chevrolet Silverado 1500 Cars & Trucks

1 Answer

1988 chevy 1/2 ton and i cant get fuel to the TBI injector . the fuel pump works and the fuel filter is clear and it turns over but it wont start what do i check to fix the problem help


Replace the pick up coil if there is fuel to the injector.If there is fuel pressure at the injector,then it is the pick up coil.If the fuel pump is working,and the fuel filter is new,then there is fuel at the injector,just no pulse,correct?

Jan 14, 2010 | 1988 Chevrolet C1500

2 Answers

Would like a print and some info on rebuilding a chevy tbi carburator. This is for a 1989 chevrolet fuel injection TBI carburator. Thanks, Jerry


Here is a real good page on TBI

http://chevythunder.com/gm_throttle_body_injection_pg_1.htm

When you ask for the kit at the part store some list it as a carburator rebuild kit and some list it as a Throttle Body rebuild kit. Not much to rebuild, Clean it put in new gaskets and o-rings. There is two different kits one comes with a new fuel pressure regulator and one does not. Best to check fuel pressure and fuel filter prior to purchasing the kit. Fuel injectors should be tested and cleaned by a shop. I found a carquest auto parts that had the machines to do it and cost me $40 for 2 injectors.

Jan 09, 2010 | 1989 Chevrolet Suburban

1 Answer

92 chevy 1500 5.7 tbi starts and dies. replaced fuel pump and filter, tbi,iac, and tps, still has same problem. fuel spray seems weak at injectors. could it be the module in distrbutor?


Try using a good fuel line/injector cleaner Seafoam is a good one. If this does not help you may have tone or more clogged injectors. Clean these out and you should be good to go. tTo see Seafoam in action goto you tube type Seafoam into the search box.

Jul 07, 2009 | 1993 Chevrolet C1500

2 Answers

1988 318 ramcharger idles very rough stalls alott


EGR valve stuck or not working clean or replace

Feb 05, 2009 | 1988 Dodge D-Series Pickups

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