Bad hesitation.........please help!

AirWolf87

New Member

Mar 14, 2004

382

0

0

L I, NY

Aug 12, 2005

#1

• Aug 12, 2005

• #1

Last night my car developed a bad hesitaiton on the highway. At low rpms under load it would buck like it was missing but no code. Today to took it for a drive and its not as bad, but in low rpms i can still feel it, and while it smooths out at higher rpm's it still runs rough and it is down on power. I replaced the fuel filter this morning but it didnt do anything. have to go to work, so i dont have time to check to plugs, but it doesnt feel like a spark issue. It almost feels like a Vaccum or intake leak, but none that i noticed and no codes

 

CanadaStang

New Member

Sep 7, 2003

2,093

1

0

Mb

Aug 12, 2005

#2

• Aug 12, 2005

• #2

Sometimes there will be a code but it won't activate the cel, so maybe try checking for codes and see if anything turns up.

 

P

PapiChuloNC

New Member

Jan 12, 2003

102

0

0

NC

Aug 12, 2005

#3

• Aug 12, 2005

• #3

Mines doing the same thing but I think mines a coil pack problem. The local body shop that did my body work sprayed down the engine and didnt dry the motor at all. The car ran like total crap for 2 days and now I have the same problem as you. It kicked off 2 codes that first day for cylinder misfire detected on cylinders 1 and 2.

 

Mr GT 02

New Member

Apr 8, 2004

548

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0

Peabody, MA

Aug 12, 2005

#4

• Aug 12, 2005

• #4

Get the car dynoed and check out the air/fuel ratio...U may be really Lean with your upgrades. This could be the cause of the bucking, and horrible throttle respone. are u hearing any pinging?????

 

AirWolf87

New Member

Mar 14, 2004

382

0

0

L I, NY

Aug 13, 2005

#5

• Aug 13, 2005

• #5

no pinging at all, the car runs great other than this. But it finaly threw a code yesterdays and i already know what it is. A few days ago my heater hose broke in the 100+ degree weather and sprayed coolant all over the back of my engine. that night i get the misfire which according to the code is cyl # 4......right by the hose, so im sure some moisture just got under the boot. ill check it out today, but ibet thats it.
thanks for your help guys

 

CanadaStang

New Member

Sep 7, 2003

2,093

1

0

Mb

Aug 13, 2005

#6

• Aug 13, 2005

• #6

AirWolf87 said:

no pinging at all, the car runs great other than this. But it finaly threw a code yesterdays and i already know what it is. A few days ago my heater hose broke in the 100+ degree weather and sprayed coolant all over the back of my engine. that night i get the misfire which according to the code is cyl # 4......right by the hose, so im sure some moisture just got under the boot. ill check it out today, but ibet thats it.
thanks for your help guys

Click to expand...

Hope you keep us posted as to how you make out.

 

AirWolf87

New Member

Mar 14, 2004

382

0

0

L I, NY

Aug 14, 2005

#7

• Aug 14, 2005

• #7

yeah sure enough that was it. I popped the boot out of cyl #4 plug and it was completely wet. I pulled all the wires out, blew the remaining coolant in the hole with compressed air and replaced all the plugs and wires, car purrs like a kitten again.

 

fudleyd

New Member

Jan 10, 2003

180

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0

Littleton, CO

Aug 15, 2005

#8

• Aug 15, 2005

• #8

Hot weather sucks, don't it? What octane are you running?

 

AirWolf87

New Member

Mar 14, 2004

382

0

0

L I, NY

Aug 16, 2005

#9

• Aug 16, 2005

• #9

87. car runs great on it. never pingged or had any problems with it, so the way gas prices are on Long Island, its good enough.