iBrent
Veteran CEG'er
Sorry I don't know what to tell you from here on out, at least it was easy to check right?
It was easy and didn't cost any money! Thanks anyway. I'm wondering if my problem is unique or if someone else has the same issue.
Sorry I don't know what to tell you from here on out, at least it was easy to check right?
Does it buck at the same throttle position all the time or is it different?
check your TPS again. this time use an analog gauge and slowly do a full sweep of the throttle with the key on engine off. watch closely. if the needle goes to Infinity at any time during the sweep then you have a dead spot in the TPS and it needs to be replaced.
Desiato: since your going to pull the PCV valve look inside the hose that goes from it to the intake manifold and see if there is any oil. iBrent you ought to check this as well.
I replaced both the plugs and wires about 10k miles ago. Autolite double plat's and Motorcraft brand wires. It didn't change anything, didn't make it better, didn't make it worse.
If there's anyone in the Mass. area who wants to bring over some extra known working plugs/wires I will reward with beer and food.
pictures please. i dont have a duratec so i i cant go look at one and see but if it goes into the intake manifold it should not have oil in it.
So I have the same hesitation/bucking issue that many people have. [...] It started about a year ago, back then it was very slight and almost unnoticeable. It has since been getting progressively worse. Its so bad now that my whole body moves front to back in third gear while accelerating. Its worse around 1500 RPM. For example, i'll be cruising around ~35mph in 5th gear (1500 RPM) and it will buck with our without throttle. When the throttle is slightly opened, it will get worse. [...]
I've done lots of searching and replaced a lot of stuff. Its really bothering me. Help please!
Here's what I've done over the last year (in order).
Had a CEL, replaced fuel filter and pump. Fixed other problems, but the bucking was still there.
Replaced plugs/wires with APP764's and motorcraft wires - NO CHANGE (not better or worse)
Cleaned K&N and re-oiled - NO CHANGE
Tested coil pack, tested out of spec, thought i had something, replaced with autozone brand...- NO CHANGE
Checked spark plugs for carbon tracking and checked gap, all tested fine.
Rebuilt intake and cleaned IAC (yesterday) - NO CHANGE
I thought I had it with the intake rebuild...but 'twas not the case. Also, when the car is warm it seems my IMRC is malfunctioning and the bucking is worse. I bought a replacement transistor and will be replacing it this afternoon. That may fix the IMRC issue, but probably not the bucking.
Any help would be greatly appreciated...and if you successfully diagnose the problem, perhaps rewarded.