2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

*HESITATION* NOT the 3800rpm hesitation!!

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Old Jan 11, 2003 | 11:07 PM
  #1  
seventhgear's Avatar
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boost on the way(GTU II)
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From: tampa,fl.
Question *HESITATION* NOT the 3800rpm hesitation!!

only happens when i make hard turns... it bucks like if it were the 3800 rpm heitaion... VERY violently !!
at first i thought it was because i was low on gas so i got a 1/4 of a tank and did the same thing all night... im thinking maybe a fuel filter?? its about 6 months new... could the fuel pump be doing n e of this? i also have a bad problem with floodingat start up.... my car starts better when cold but i still have to use the fuel cut off switch... when its warm it takes alot longer to turn on ....
thanks in advance for u guys' help
jack
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Old Jan 11, 2003 | 11:10 PM
  #2  
seventhgear's Avatar
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boost on the way(GTU II)
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From: tampa,fl.
ohh yea it bucks when im turning only when im on the gas.... and will keep doing it until i let off and then push the accelerator again... one time.... it kept on even though i let off....
ok i hope thatz enough info
jack
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Old Jan 11, 2003 | 11:26 PM
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HAILERS
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From: FORT WORTH, TEXAS,USA
Fuel filter/screen on the fuel pump itself is clogged. Either get a new one or soak that one in acetone overnite. Or, take that screen off, reinstall the pump and go for a ride. If it still does it, then it ain't the filter/screen. Could be the regular fuel filter though. Change it and see what happens. Start with the one in the fuel tank attached to the fuel pump first.
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Old Jan 11, 2003 | 11:31 PM
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boost on the way(GTU II)
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From: tampa,fl.
thanks hailers! but COULD THAT BE LINKED TO MY flooding somehow?? being clogged it would restrict fuel to the injectors right ? i will prolly replace both but i just wanted to see if n e one had the same prob ...
jack
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Old Jan 12, 2003 | 12:01 AM
  #5  
seventhgear's Avatar
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boost on the way(GTU II)
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From: tampa,fl.
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Old Jan 12, 2003 | 12:27 AM
  #6  
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pei > caek
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From: Mars
A dirty fuel filter wont cause flooding. However as a filter deteriorates junk will make it to the injectors and clog them. Solve the bucking issue and run some fuel injector cleaner.
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Old Jan 12, 2003 | 01:08 AM
  #7  
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From: Rohnert Park CA
Actually dirty fuel filters can cause flooding, by the dirty fuel forcing itself past the clog filter elements...

Doesn't take a very large particle to make it past the fuel filter to clog an injector open
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Old Jan 12, 2003 | 07:24 AM
  #8  
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HAILERS
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From: FORT WORTH, TEXAS,USA
I was mostly just talking about the bucking during cornering. We've seen that problem on this forum and in a few cases its led us to the filter screen on the fuel pump. Its really not too big a deal to pull the pump and either swap the filter screen or soak it in some acetone.

But that does not help all cars. Could be just a loose plug on the afm that is getting pulled loose on cornering then reseats itself.

Notice how I've avoided the question about the flooding???? Thats a bag of worms. Dirty fuel injectors maybe, but I just saw a post by Fat Dirty Pig , who says he just had his cleaned and still has the problem. Low compression will cause the same problem on startup. Some say a car with low compression might start good when cold because the oil around the rotor seals is thicker than when the car is hot, therefore gives a good start when cold but not hot.

Bag of worms. I know when I've rebuilt a engine, with one exception, the cars flooded easily and were hard to start in the beginning. Thats due to low compression on a rebuild because the apex seals have not seated/broken loose for the first hour or two. So I rig a fule cut switch initially to keep from wearing out the starter.

Bag of worms.
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