no pedal after certain load 96 12v
 

my 1996 12valve has been running fine but when i get to a certain speed or rpm i push the pedal and it does nothing almost seems like it bogs down a little bit can anybody help ?

Have you checked the external throttle linkage and cable? Are you located in a cold climate currently?

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Checked tge throttle she feels good and it's chilly around here 50-20s

What rpm are you at when it does this and when is the last time you changed your fuel filter?

sounds like the cable is jaming up in the cover ... :humm:

Hmm what could I do to fix that I don't think wd40 will get me outta this one

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It's around 2 grand and I'm going to change the filter today

I would make sure that the linkage is getting the full throttle ... you may end up needing a new cable ... but verify that you able to get WOT first .... have someone in truck push slowly to floor ... look for jaming or obstructions ... If you see none ... buy new cable and should eb good to go .


they usually come apart inside the cable sheeth ...:ouch:

If it still has stock governor springs at 2000 rpm I wouldn't think it would have a lot left to give and that might be why it feels like it is bogging down maybe someone else will have a different opinion

X2

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Just got done having this same EXACT problem,fuel filter was the culprit,but could also be low fuel pressure to the injection pump:rocking:

Did you experience white smoke and a pop? Those are the most common low fuel pressure symptoms I've seen!

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Yes,sir:tu:But the truck ran fan after i change the fuel filter,but i replaced the lift pump a couple days after just cause it had 200k on it:tu:

It has good throttle when in park but not in drive haven't done the fuel filter yet can't find the wrench I need for it but I know I have one, of it was a fuel problem wouldn't she smoke?

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She does randomly stall sometimes in drive at idle mostly when she's cold

No,she wouldn't smoke cause its starving of fuel and when she does smoke its getting to much that it doesnt burn!Just change the fuel filter and see if that was it and if not,change the lift pump and if still does it your going to have to get more deep into it!Does it have a lope at idle?:humm:

It kinda has a little lope

Now thats changes somethings,You might have air getting into you fuel,leaking injector line things like that?

The most common low fuel pressure symptom is white/blue smoke and a pop. So your seriously going to tell this guy to replace his lift pump without checking his pressure? Without checking for the possibility of a bad overflow? A leaking afc boost reference? Don't you think an injector line would cause a hard start and misfire not a power loss above X rpm?

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He never mentioned a harsh clicking noise which is do to a bad overflow valve and and wouldn't a boost leak cause lots of black smoke and a loss in power?A little lope i thought that would have to do with air intrusion?:humm:
Not trying to start an argument this is just coming from my little bit of knowledge and there is no doubt you no way more than me.:hellox:

I'm not saying your giving bad information or trying to down you. I'm just trying to avoid us telling someone to replace parts without required data to condemn those items. Maybe there should be a sticky on diagnosis of items like this.
If I've learned anything from my Stent in the automotive field it's that no 2 trucks fail identically. The overflow can fail and be silent, a boost leak at the afc reference line will prevent the afc from traveling while still too small to cause major drive ability issues aside from low power, however that typically is an issue while accelerating. Just trying to say we need more data before changing parts.
My plan of attack would be a fuel pressure gauge installed and re create the problem. If pressure is low while it occurs we move that direction if not we look elsewhere. Another concern is the truck actually malfunctioning or operating within the typical range and the owner feels it's doing something wrong that's completely normal. My question for that would be did the problem just start, come on slowly or has it been occurring since you've owned it?
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Alright,learn something new day!:tu:

X3
Just did all the fuel upgrades. 4k gsk was the most noticeable!

How do you like your 64/74/14?

not sure if this will help..i had a loss of power while at speed..eventually low power up hills..turned out my wastegate actuator was leaking. replaced that and power was back to norms.

Actually was very surprised. I was expecting some high EGT's but after a considerable amount of tuning can't seem to break 1200 :rocking: just pulled 10k lbs from Ft Worth Tx to Savannah GA with plenty of power and ran between 800-1000 the whole way! Maybe one or two Hills at 1150. Only thing I'm not happy with is the lag and it was expected. It doesn't light off until about 1600 - 1800 rpm but when it lights there is no waiting. 0-49psi in the blink of an eye! So all in all loving it! Just wish I could light it faster!

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