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94 jimmy hestitating with accleration after letting off gas ...
Sent to Car Experts May 21 01:53 PM

94 jimmy hestitating with accleration after letting off gas stops recently replaced fuel pump and sending unit also just replaced distributor cap and rotor still not accerlerating correctly any ideas

 

Optional Information:
1994 GMC jimmy vortex

Already Tried:
fuel pump and sending unit replaced about a month ago /today replaced distributor cap and rotor.

Customer (name blocked for privacy)
Status:  Closed   Value: $15
Info Request
May 21 4:27 PM (2 hours and 33 minutes and 15 seconds later)
         
REPLIED to Info RequestCheck Mark
Is the check engine light coming on at all?

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Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2714 Car Accepts
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May 21 4:44 PM (17 minutes and 50 seconds later)
         
Reply to Hammer Time's Post: no the check engine light does not come

Edited by Customer (name blocked for privacy) on May 21 2006 at 4:46 PM
Customer (name blocked for privacy)
Info Request
May 21 4:57 PM (12 minutes and 29 seconds later)
         
REPLIED to Info RequestCheck Mark

Does the engine seem like it's misfiring?

Will it idle smooth at all?

How is the power at cruise speed?

Any hard starting?



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Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2714 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
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May 21 5:00 PM (3 minutes and 12 seconds later)
         
Reply to Hammer Time's Post: seems like miss firing thats why replaced distributor cap and rotor starts fine idles ok has hard time accelerating cruise speed ok for awhile but if try to increase speed hestitation occurs then ok
Customer (name blocked for privacy)
Answer
May 21 5:07 PM (6 minutes and 33 seconds later)
         
REPLIEDCheck Mark

The plugs and wires are much more likely than the cap and rotor for causing that.

You could also have a messed up injecter but you need to eliminate the ignition first.

Finding which cylinders are missing would be very helpful in narrowing it down.



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Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2714 Car Accepts
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May 21 5:09 PM (2 minutes and 33 seconds later)
         
Reply to Hammer Time's Post: how do i find out which cylinder is missing any ideas doing myself
Customer (name blocked for privacy)
Answer
May 21 5:14 PM (4 minutes and 23 seconds later)
         
REPLIEDCheck Mark
If it has a rounded top distributor cap, not the flat one, you can use a testlight and slip the probe inside the boot while the clip lead is grounded. Thay way you short each cylinder one at a time and listen for any that don't effect the engine when shorted. Don't puncture the wire. If you have no access there, you will have to use insulated pliers and pull one plug wire at a time.

Edited by Hammer Time on May 21 2006 at 5:15 PM

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Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2714 Car Accepts
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May 21 5:21 PM (7 minutes and 50 seconds later)
         
Reply to Hammer Time's Post: have to use pliers pull wires off in any certain order like firing order or other . do you think any of this might have to do with oxygen sensor

Edited by Customer (name blocked for privacy) on May 21 2006 at 5:34 PM
Customer (name blocked for privacy)
Answer
May 21 6:32 PM (1 hour and 11 minutes later)
         
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