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08-26-2008, 02:39 PM
| #1 |
| Junior Member  Join Date: May 2008
Posts: 6
 |  99 chevy k2500 hesitation hi everyone i have a 99 chevy k2500 4x4 , when i start it in the mornings i have a hesitation or a sputter when i first start driving , through the power it runs fine and once i reach a cruising speed it starts to sputter again. if i unplug the mass air sensor it seems to run better, mass air sensor is new. has new plugs, wires, cleaned egr valve, dist cap and coil all new, and dont hear a vacum leak. anybody have any more ideas , thanks for help |
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08-26-2008, 07:02 PM
| #2 |
| Senior Member  Join Date: Dec 2007 Location: Really FAR NORTH!
Posts: 1,031
 | what kinda MAF is it? OEM? try cleaning it, mine gums up from the K&N sometimes causing weird symptoms, could check you Idle Air control valve...are you able to get a vacuum reading?
__________________ Red seal certified Journeyman Automotive Mechanic Supercharger comming soon!  |
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08-27-2008, 05:48 AM
| #3 |
| Senior Member Join Date: Dec 2007
Posts: 253
| Could be a vacuum leak. Get a spray can of carb cleaner or similar and spray on while listening for a change in engine note. Could be a defective temp. sensor. May be worth while changing fuel filter and running a can of fuel injector cleaner thru it. Most importantly have you any codes? |
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08-28-2008, 09:10 AM
| #4 |
| Senior Member Join Date: Aug 2008 Location: williamsburg virginia
Posts: 114
| i would check the IAC also... |
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