Throttle surge when stopping at idle

[michaelhinrichsen]

'01 4.4 with 75K, Does anyone know why the vehicle surges when you stop at a stop light at idle. It is if someone stepped on the gas just before I come to a stop. The vehicle doesn't show any other problems that I'm aware of and I've eliminated all other issues with no current error codes showing.

[JT///MC]

I've heard of this issue from another person, but I don't know what the resolution is. Subscribing.

[michaelhinrichsen]

I forgot to mention that it doesn't surge if you slip into neutral while coming to the stop. It must be in gear.

[JohnD]

I had the same problem on my 2001 4.4 X5 with 72K miles. My car was throwing a few error codes on the Peak scan tool but my local indy couldn't get them to come up on his G1 computer. The codes said had a lean idle on 1-4 and 5-8. My mechanic recommended cleaning the injectors and throttle body with BG44K. It cost me $179 for them to do it and the truck runs amazing - best of all not error codes anymore. Hope this helps

[jac80m]

yeah, i have a 04 4.4 and i find the kick back into first gear seems to happen at just the wrong time....i'm trying some injector clean as we speak...see if that cures it...

[jst2878]

whats BG44K, where do you get it?

[JohnD]

You can order it online through ebay and other places. It is what the dealer uses to flush the system. Rather than use just the tank treatment I had them open the fuel lines.