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Heavy hesitation during Acceleration

  • Thread starter Thread starter shlby123
  • Start date Start date Dec 5, 2007
S

shlby123

Founding Member
Apr 19, 2002
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Dallas
Dec 5, 2007
#1
  • Dec 5, 2007
  • #1
Hey fellas. I have a '93 2.3 Convertible that I just picked (trying to save from parting out if possible) and amongst the money things on that need some work are the idle and acceleration issues it has. When I'm at stoplights the tach suck downwar FAST to right around 300-400 RPM and just baaaarely stays running, but hasnt ever just died on me yet. (Car is a 5 speed) And when I try to accelerate in any gear I get heavy hesitation border-lining chugging as I try to move. The only time it does not happen is when Im doing 60-70 on the highway and then it's great. Anybody have a list of all the different things I should check/replace? please.
 

Distortion 5.0

New Member
Jul 8, 2005
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0
Dec 5, 2007
#2
  • Dec 5, 2007
  • #2
shlby123 said:
Hey fellas. I have a '93 2.3 Convertible that I just picked (trying to save from parting out if possible) and amongst the money things on that need some work are the idle and acceleration issues it has. When I'm at stoplights the tach suck downwar FAST to right around 300-400 RPM and just baaaarely stays running, but hasnt ever just died on me yet. (Car is a 5 speed) And when I try to accelerate in any gear I get heavy hesitation border-lining chugging as I try to move. The only time it does not happen is when Im doing 60-70 on the highway and then it's great. Anybody have a list of all the different things I should check/replace? please.
Click to expand...

I would do a complete inspection of the ignition components. Check timing, and maybe even inspect the timing belt for wear. I would look out for vacuum leaks too. Those can make MAF car's run screwy. Then you could test fuel pressure, compression, maybe even do a fuel injector balance test.
 
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shlby123

Founding Member
Apr 19, 2002
579
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0
Dallas
Dec 5, 2007
#3
  • Dec 5, 2007
  • #3
how do I do a fuel injector balance test? Is that strictly for a shop?
 

Distortion 5.0

New Member
Jul 8, 2005
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Dec 5, 2007
#4
  • Dec 5, 2007
  • #4
shlby123 said:
how do I do a fuel injector balance test? Is that strictly for a shop?
Click to expand...

Depends on your ability. It requires a tool that connects to the injector, and a fuel pressure gauge. What you do is prime the fuel system, then use the balance tester to pulse each injector, and then measure the fuel pressure drop on each injector. Best way is to prime the system per injector to make sure you get accurate readings.
I haven't found a cheap balance tester yet, I've been thinking about just making one. If I get around to it and it works good I'll post a DYI write up. I don't think they are all that expensive, but nor are they complicated.

*EDIT*, oh, and check the codes if you haven't yet
 
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shlby123

Founding Member
Apr 19, 2002
579
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0
Dallas
Dec 5, 2007
#5
  • Dec 5, 2007
  • #5
cool I'll pull some codes and post back up. The best starting place anywho I guess
 
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SILENTCARL

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Feb 15, 2007
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Dec 11, 2007
#6
  • Dec 11, 2007
  • #6
It really sounds like an ignition problem. Maybe the Ignition Module?
 

Distortion 5.0

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Jul 8, 2005
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#7
  • Dec 11, 2007
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SILENTCARL said:
It really sounds like an ignition problem. Maybe the Ignition Module?
Click to expand...

He would have a DIS module. And usually when those go out the tach starts reading 50% less than actual engine RPM right? It's been awhile since I trouble shot a 2.3 but I believe that's what mine did.

I have two DIS modules I need to find homes for if anyone needs one. PM anytime.
 
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