BUCKING BELOW 1500 RPM
- Thread starter godstangit
- Start date
I narrowed my similar problem down to a fuel pump relay. I pulled codes and got a fuel pump relay fault. I think it has something to do with the huge plug by the colant resevoir tank.
If you find a fix let me know.
If you find a fix let me know.
MysteryMachine
Active Member
blksn955.o
Founding Member
from a tune aspect, the maf may be the fault as well. Low rpm bucking/load is a symp. of a maftransfer that is off.
I had that same problem a couple months ago. It turned out to be two of the plug wire boots had melted down to the core and I guess were arcing on the headers. Changed the wires, and the low-rpm miss went away instantly. Damn those infernal equal-length headers
MysteryMachine
Active Member
you can give them to me1TallMF said:I had that same problem a couple months ago. It turned out to be two of the plug wire boots had melted down to the core and I guess were arcing on the headers. Changed the wires, and the low-rpm miss went away instantly. Damn those infernal equal-length headers
On my car is it the same as always on WT. But every once in a while it will buck once.HISSIN50 said:
SM0k3
Founding Member
Alittle off topic, but I just put those thermal boots on the two plug wire that were rubbing on the header tubes. I haven't had a problem in two and a half years yet.1TallMF said:I had that same problem a couple months ago. It turned out to be two of the plug wire boots had melted down to the core and I guess were arcing on the headers. Changed the wires, and the low-rpm miss went away instantly. Damn those infernal equal-length headers
yellowclone said:
I am going to do the exact same thing to the new wires before they melt too. I'm procrastinating though, they are harder to find than I had thought they would be, there's not too many performance shops around here, and none of the regular parts stores have them. I'll order a set tomorrow maybe.
Well I notice it when under a slight load at low RPM but wide open it hauls pretty good with no apparent problem, cleaned the MAF, checked for vac. leaks,and re-set the idle 750-800, and no codes, BUT I did notice a ticking sound coming from the PCV valve, and was wondering if that is normal cause Ive never heard them make noise before, theyre supposed to rattle around when you check them but this was too wierdHISSIN50 said:
godstangit said:
Well
When I first read your original post and glanced down at your provided sig, which is much appreciated btw
I said to myself ... Its cause he's got all those Hot Rod parts
I saw later in the thread where Greg mentioned some things about the tune and you seemed to dismiss the info with your "its never done it before" reply.
However with this post, it seems to tell a different story
If it has indeed never done it before, it could be something mechanical, or something like an electrical connection, v leak, etc.
If it has always done it ... then ...............
I can say most Stangs with mods like yours experience drivability issues such as you talk about here
I experienced that kinda stuff and more with my combo
I was able to get the demons exercised with my Tweecer
I did stuff like Greg talked about above
and
Lowering spark values in mid load driving conditions helps with bucking a good bit as well
Grady
Thas why Im not ganna tell my dad and grandfahter if I do anything to my car. lol. As soon as something goes wrong, thats all Ill hear.final5-0 said:I said to myself ... Its cause he's got all those Hot Rod parts
FINAL 5-0: I stand corrected I shouldve said "it hasnt done it this bad before" It really ran alot smoother before, now it feels as though the trans is gonna fall out of it unless I down shift and even then it feels like a miss untill wide open, checked it for vac leaks today with some carb cleaner and nothing,I might lower the timing to 12 or so and change the PCV valve thats ticking and see what it does.
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