Engine/Transmission (1994 - 1998) 98 12 valve fuel linkage adjustment / not obtaining WTO/Breakover

[MikeHymiller]

I have all settings to stock spec except 1 11/32" difference between full throttle and idle position measured at bellcrank to cable bracket. 5/16 short. Too much to get out of moving the ball stud on the throttle arm upward. I also am not achieving throttle breakover and there fore not acheiving WOT.



The throttle has a stick point at about 1/4 to 1/2 acceleration then pops and continues, and there isn't any interference. New TPS set within specs with idle adjusted.



Does not appear that I have full movement of throttle before stop tang on throttle lever contacts high idle screw. I am the second owner and there is not a factory seal on the high idle. The screw is covered in oil gunk and nothing else around it is. It also does not appear the same as the service manual picture.



I cannot find anything about bosch 7100 factory high idle settings or figure out why I can't achieve WOT/BREAKOVER. ANYONE?

 

[GAmes]

Which service manual? The factory service manual gives complete instructions for adjusting the linkage. The high idle screw isn't supposed to be adjusted. If you look at the rear attachment point of the throttle rod the ball has several positions it can be installed in.

 

[Cosmo]

I'd check to see if the arm is riding properly on the fuel plate.

 

[MikeHymiller]

Throttle lever rod adjustment has notches for moving ball stud upward or downward and each notch is a gain or loss of 3/64. There are two upper notches left to adjust and 3/32 is not going to get me close to the 5/16" that is specified in the factory chrysler service manual for the second generation 1998 5. 9L 12 valve.

The mention of the high idle screw leakage and the absense of the factory seal (wire) was to indicate that there may have been an adjustment made to the high idle. Otherwise why is the seal missing.
the high idle screw looks just like the cam gear timing pin for top dead center as it sits behind the gear housing only smaller. However, the high idle screw does not have the same oval or diamond shaped base as shown in the manual. All that is there is a small circular sleeve that turns freely and sits against the pump. The screw or pin extends through this sleeve approimately 1/2" to 3/4". I have not touched it and am searching for information that will confirm or negate the idea that it has been previously adjusted incorrectly and that it is adjusted out too far for the trottle to obtain full travel before the stop tang on the throttle arm is seated on the high idle screw. As I said I have already achieved all other linkage adjustments. WOT/breakover / Trottle travel / distance between full throttle and idle from bracket to belcrank stud of 1 11/32 are my problems. chasing it in circles
so I assume something else is wrong if I can get all but one measurement in the linkage correct but one and all obvious causes have been eliminated. I hope that I have been more clear and I appreciate your reply. Thanks Any other ideas?

 

[MikeHymiller]

Thanks for the reply. Please explain further.

 

[GAmes]

I believe that sleeve that turns freely covers a locknut. If it is still installed it seems to me it hasn't been tampered with. The lockwire is small, and easily broken. Neither of the IPs that I have has wire on them and I know the one that is on my engine hasn't been tampered with.

 

[MikeHymiller]

I'd check to see if the arm is riding properly on the fuel plate.

Please explain. I have not been into the fuel plate myself. I did have a shop slide it forward a bit. The arm?

 

[Cosmo]

I haven't had it happen, but I've heard people talk about the governor lever getting stuck under (I guess?) the fuel plate.

I'm not sure how it happens or why, or if it's even possible with stock internals.

There's a couple of cutaway views here (and walkthrough of how to make a grip more power for nearly free)
http://dodgetrucksxtreme.com/index.php?topic=8477.0

 

[MikeHymiller]

I haven't had it happen, but I've heard people talk about the governor lever getting stuck under (I guess?) the fuel plate.

I'm not sure how it happens or why, or if it's even possible with stock internals.

There's a couple of cutaway views here (and walkthrough of how to make a grip more power for nearly free)
http://dodgetrucksxtreme.com/index.php?topic=8477.0

Thanks, I will give it a look.

 

[MikeHymiller]

I believe that sleeve that turns freely covers a locknut. If it is still installed it seems to me it hasn't been tampered with. The lockwire is small, and easily broken. Neither of the IPs that I have has wire on them and I know the one that is on my engine hasn't been tampered with.

I tend to agree with you. Thank you for explaining.