P38A sticky throttle, same problem but different.

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Sonnycbr

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Hi, I've used the search function for a sticky throttle and found a very similar problem but mine's slightly different. The previous post said the problem was worse in warm weather, definitely not a problem now.
When I start the engine from cold and pull away the throttle is nice and smooth, but as soon as the engine gets up to working temperature, it becomes very sticky and I have to push down hard, giving a very lumpy ride.
I've cleaned the throttle body and greased the linkage but it hasn't worked. Any further ideas that I can try?
 
Sonnycbr said:
Hi, I've used the search function for a sticky throttle and found a very similar problem but mine's slightly different. The previous post said the problem was worse in warm weather, definitely not a problem now.
When I start the engine from cold and pull away the throttle is nice and smooth, but as soon as the engine gets up to working temperature, it becomes very sticky and I have to push down hard, giving a very lumpy ride.
I've cleaned the throttle body and greased the linkage but it hasn't worked. Any further ideas that I can try?
Click to expand...
Presumably it's a V8, 4.0 or 4.6?
 
Get the engine warm & then disconnect cable from throttle body. Now check both cable & throttle movement individually by hand ?
 
I've cleaned the throttle body this morning and thought I'd solved the problem but I was wrong, just the same. I did get loads of black crap out of the body so not a total waste of time. I'll see if I can read up on disconnecting the throttle cables and try that. There's definitely something to do with the heat generated from the engine that's causing the problem as it works fine until I've driven for about 5 minutes. I think oiling the cables might work but I'm not sure how to disconnect them so I'll look into that.
 
It WAS the throttle cable. When I oiled the cable, quite a bit of rusty water came out at the pedal end. I don't know if this is common or not but it was certainly the cause of my problem. Another lesson learned so I'm very happy. Thanks once again for all the help[.
 
Sonnycbr said:
It WAS the throttle cable. When I oiled the cable, quite a bit of rusty water came out at the pedal end. I don't know if this is common or not but it was certainly the cause of my problem. Another lesson learned so I'm very happy. Thanks once again for all the help[.
Click to expand...
Bowden cables require regular oiling, I have a nice little device specially for the job.
 
Cheers Data, I'll do it regularly. Is every 6 months excessive? I was surprised at the water but it obviously gets in from somewhere. What's your device?
 
Sonnycbr said:
Cheers Data, I'll do it regularly. Is every 6 months excessive? I was surprised at the water but it obviously gets in from somewhere. What's your device?
Click to expand...
My cable oiler is ancient from motorcycle racing days. You have to free the end of the cable, it then goes into a cylinder full of oil via a compression joint, I then just have to pump and oil is forced up the cable. Might be able to find one on the internet, look for "Cable Oiler"
 
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