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When I press on the gas, the engine hesitates

The injectors have been cleaned ( it ran good for a week),fuel filter was replaced, the exhaust was checked out ( o.k. )and it does not happen all the time. the weather is not a factor ( it happens on sunny day and raining days. It's a 2000 Chevy Z28.

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  • Cars & Trucks Master
  • 5,628 Answers

This is lest ;plugs,wire,coils.

Posted on May 08, 2013

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Posted on Jan 02, 2017

  • 1861 Answers

SOURCE: 99 tacoma

Still need the codes.
Injectors can go "bad" in a couple of different ways; all they are is an electromagneticaly controlled nozzle. When the ECU "fires" the injector, it pulses a ground circuit for 4-8 milliseconds, the electromagnet powers up, the valve at the bottom of the injector opens, and the fuel shoots out, under pressure. The wire can be bad/chafed/corodded/ The electromagnet may be weak. The nozzle may be stuck. Lots of things. But, to put in an injector for a number 4 cylinder misfire (p-0304 code) would be one of the last things that I would do.

Posted on Nov 21, 2008

  • 295 Answers

SOURCE: HELP! HELP! SOMEONE PLEASE ! 2001 chevy blazer fuel problems

I would check to be on the safe side the fuel filter is going in the right direction. The arrow is pointing towards the engine away from the fuel tank, Then you need to make sure the fuel pump wiring connections are good contact and did not come loose when driving.

Posted on Mar 18, 2009

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SOURCE: 1994 GMC JImmy 4.3 V6 running very roughly

fuel pump sock or try the egr valve to see if it is stuck open all the time. can't remember if that one has the digital one and a vachumm type as well, next would be the evaperative canister purge valve.

Posted on Jul 05, 2009

  • 7 Answers

SOURCE: 1993 Chevy S10 Blazer engine hesitation with smoke from exhaust

Had a 94 Olds Bravada that did a similar thing and it was EGR valve on the front of the intake. It' s easy to take off and clean with WD 40 and if you have an air compressor blow it out good.

Posted on Jan 24, 2010

  • 1 Answer

SOURCE: 2004 dodge 3500 cummins diesel sometimes hesitates then dies

My 2004 had the same issue and i replaced the transfer pump. It started right up and ran fine until the next morning i was driving it stalled. Now it won't start up not even with starting fluid.

Posted on Feb 22, 2010

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1994 chevy suburban help


It could be low fuel pressure from a weak pump. A fuel pressure test would find out. When the engine is cold, the computer keeps the injectors open longer-a cold engine needs more gas to run than a warm one. When at normal operating temperature, the computer matches the gas to the incoming air. If you have low fuel pressure against the injectors, that is when you would notice the hesitation. A possibility anyway.
If fuel pressure is good, check for trouble codes. A sensor may be sending the wrong information. Could be the mass air flow sensor-the one that tells the computer how much air is coming in so it can match the right amount of gas for it-through the injector on-time. There it is, your injector pulse width is too narrow. Causes lean running, stumbling, hesitation. Another possibility. Check for codes first.
If not air or gas related (is your air filter clean? And the gas filter been changed in the last 2 or 3 years?), and no codes, and fuel pressure is good, you may have to keep looking for an electrical fault. If it runs good when cold, doesn't seem likely to be a mechanical fault.

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What parts do I need for 91 F150 xlt 5.0. Tune up! My X, put power steering fluid in my gas, thought it was the fuel injection cleaner I bought at same time! I have put several treatments & have ran it...


You could try another fuel filter and some heavy duty injector cleaner. A garage would use a product that hooks into the fuel line and skips the gas tank to clean the injectors. The PS fluid could have also gummed up the fuel pump in the tank.

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Fuel ignition,


White smoke from the exhaust is usually an
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It been hesitating and yes i've ran out of gas a few times


It could be a lot of different things. It could need a good tune up. A fuel filter. Or it could be a little more involved like the fuel pump. You said that you have ran it out of gas a few times, believe it or not but the fuel pump gets cooled off by the gas in your gas tank. If running out of gas is a common occurrence for you the pump could have gotten too hot overheated and now is showing signs of failure. The first thing I would do is check the spark plugs and possibly replace them. That is going to be the cheapest route. If not then it could get more involved. Good luck!

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On 1995 saab engine skipping and hesitation when hot


POSSIBLE CAUSE FOR MISSING AND HESITATION BAD COIL - FAULTY SPARK PLUGS AND WIRES -WEAK FUEL PUMP.CHANGE FUEL FILTER AND CHECK FUEL PRESSURE SHOULD BE 43 PSI. CLEAN FUEL INJECTORS BY FILLING UP FUEL TANK PUT A BOTTLE OF SEAFOAM IN FUEL TANK CLEAN OUT THE INJECTORS.IF ALL LOOKS GOOD.OTHER POSSIBLE CAUSES TO MISSING ENGINE COULD BE INTAKE MANIFOLD VACUUM LEAK OR HOSES LOW ENGINE COMPRESSION.HAVE EXHAUST SYSTEM CHECK FOR RESTRICTION BECAUSE YOUR TURBOCHARGER NOT GOING TO GIVE YOU MUCH POWER ON ACCELERATION.

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1993 Chevy S10 Blazer engine hesitation with smoke from exhaust


Had a 94 Olds Bravada that did a similar thing and it was EGR valve on the front of the intake. It' s easy to take off and clean with WD 40 and if you have an air compressor blow it out good.

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Hesitation on acceleration, engine delay, almost cuts out in 93' Plym Gr Voyager LE with 3.8L eng. (74K mi), main use to tranport 2 wheelchair bound individuals to and from doctor appointments (is modified...


Have someone press on the gas petal while you feel the exhaust coming out of the tail pipe.It should have more exhaust coming out as the petal is pressed farther down. This method is checking for a restriction in your catalitic converter. A high flow type is best. Also make sure your air filter is clean and nothing blocking your air filters intake.

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