dave88sw Posted September 21, 2014 Share Posted September 21, 2014 Hi, i'm looking for suggestions as to why my 3.9 hotwire (late serp) is "lurching" on medium acceleration. Basically, if i tickle the throttle and let the revs increase, it's fairly smooth, equally if i give it a boot full it pulls hard, but normal driving with about half throttle, particularly hills, it lurches and isn't smooth (no misfires, just doesn't accelerate smoothly). I haven't tried much so far, but it's very recently had (all genuine) leads, plugs, dizzy cap, rotor arm. One thought was that maybe the vacuum advance is sticking? So i was thinking of dribbling some oil down into the dizzy but is there anything else i can look for? Thanks Dave Quote Link to comment Share on other sites More sharing options...
duncmc Posted September 22, 2014 Share Posted September 22, 2014 TPS on the way out? Quote Link to comment Share on other sites More sharing options...
dave88sw Posted September 22, 2014 Author Share Posted September 22, 2014 It's possible although it looks like a fairly recent replacement (i've not long bought the car), i was also told when i bought it that it had just had the AFM replaced (which i do believe because it's spotlessly clean). I suppose the best start would be to get it plugged in but if it is something like a sticky advance it wouldn't show a fault would it? Cheers Dave Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.