"Dead zone" at 90% Throttle or more . . .

Dave Colgan · #1 03-09-2010, 07:21 PM

'92 2.3 5sp, 200,000 miles . . . .

this little baby runs damn good for it's age, but I can't put my foot in the gas 'cause she stumbles at full throttle. I can back off and it runs fine. Good idle, fair pickup, but just can't jam the pedal to the floor; can't pass a burro with a load of coffee beans. Replaced the TPS, air filter. Gonna replace fuel filter, plugs & wires, but gotta be something else.

Also, intermittant CEL, but used the Zone's ODB-I and it said no stored codes . . . . WHAT??

RangerLuc · #2 03-09-2010, 08:11 PM

Quote:

Originally Posted by Dave Colgan

'92 2.3 5sp, 200,000 miles . . . .

this little baby runs damn good for it's age, but I can't put my foot in the gas 'cause she stumbles at full throttle. I can back off and it runs fine. Good idle, fair pickup, but just can't jam the pedal to the floor; can't pass a burro with a load of coffee beans. Replaced the TPS, air filter. Gonna replace fuel filter, plugs & wires, but gotta be something else.

Also, intermittant CEL, but used the Zone's ODB-I and it said no stored codes . . . . WHAT??

i wouldnt be surprised if it was your fuel filter

earnbud · #3 03-10-2010, 09:21 PM

Quote:

Originally Posted by Dave Colgan

used the Zone's ODB-I and it said no stored codes . . . . WHAT??

I was told that it means there is no codes the store has available, for the year of the vehicle because they said they only keep codes for vehicles a few years old

Thats what i was told with my 94'

Dave Colgan · #4 03-20-2010, 04:22 PM

Any more ideas? Changed the fuel filter and did the "Throttle Cable Mod" by tightening up the cable travel . . . . . I get more response off the line, but still got the stumble at full throttle.

Problem now is, after the cable mod the problem appears at about 3/4 throttle instead of 90% . . . . .

1STranger · #5 03-20-2010, 09:18 PM

check to see if your getting strong spark. weak spark will cause problems at high RPM

Dave Colgan · #6 03-20-2010, 09:58 PM

All -

Thanks for the tips, but I may have jumped the gun a bit here (red face). . .

As I was posting my last question, I was actually waiting for the throttle body and MAF to soak real good . . . didn't think that would help my cause.

Threw things back together, 'cause I had to run to the store. Lo and behold, no more "stumble" . . . . hard to believe all it took was were some chemicals in the pipes. Sprayed the MAF REAL good with MAF cleaner, and carb and choke cleaner down the throttle body. Throttle oozed some tobacco juice looking crap and ran the engine while spraying some more down there.

Truck runs GREAT!! Can't believe that's all it was, but I'm knocking on wood. .

THANKS AGAIN!