Jumpy throttle 92 2.9l, start of acceleration
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Joined: Jan 2020
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From: Campbell River, BC
Jumpy throttle 92 2.9l, start of acceleration
From neutral and first/second a little bit, at idle and low throttle he does a weird jumping in revs even tho I’m holding steady. It’s also at a weird temperature, if it’s ice cold he doesn’t do it, in between is the worst, warm he does it but drastically less. Only at slight throttle and if I ride the clutch out it doesn’t make the truck jump back and forth like a bucking bronco 
Do you have a Volt meter and a sewing pin/needle?
Test TPS's(throttle position sensor's) Middle wire
Key on engine off
Pierce the middle wire
Put Volt Meter on a Ground
And the needle
Should see .69-.99 volts, under 1 volt
Now open throttle manually a little at a time
Should see a nice STEADY rise in voltage, no jumping around
At wide open you should see 4.5-4.9volts
Then slowly close it, and watch as it goes down
If there is ANY jumping around of voltage replace TPS
TPS is the same as a light dimmer or volume control, a variable resistor, and it can get dead spots or shorts
Test TPS's(throttle position sensor's) Middle wire
Key on engine off
Pierce the middle wire
Put Volt Meter on a Ground
And the needle
Should see .69-.99 volts, under 1 volt
Now open throttle manually a little at a time
Should see a nice STEADY rise in voltage, no jumping around
At wide open you should see 4.5-4.9volts
Then slowly close it, and watch as it goes down
If there is ANY jumping around of voltage replace TPS
TPS is the same as a light dimmer or volume control, a variable resistor, and it can get dead spots or shorts
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