engine bucks and misses randomly

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Notmyidi

Full Access Members
Joined
Jul 28, 2012
Posts
107
Reaction score
5
Location
oklahoma
i have not pulled codes yet, but i was wondering if this was a common issue that is easily found.

On friday i hooked up a trailer and headed 400 miles south of where i live to pick up a truck for parts for another project i have.

About 300 miles in, i slowed for construction upon reacceleration, it started missing real bad. took quite a while getting back up to speed. seemed when if i applied more than half throttle it would start bogging like it was flooding out, but if i allowed it to upshift to 4th and the rpms dropped it wouldnt have enough power and would just downshift and go into the higher rpms and run fine-ish.

Like around 2200-2900 rpms it would run like hammered crap.

then 5 miles later it would run fine. but everytime after that when i would slow then reaccelerate it would do it again, but not for as long each.

Now that my trip is all over its still lightly cutting out every once in awhile.

It has a new pump and filter previously, clean air filter. about 170k miles and i have no idea what the previous owners maintenance morals where.

on this trip, since my cruise control clip is broken my mpg ranged from 9.2 mpg to a whopping 16. the missing had no relation to my low mpg i was ready to get the hell home.

Thoughts?
 
Last edited:
OP
OP
Notmyidi

Notmyidi

Full Access Members
Joined
Jul 28, 2012
Posts
107
Reaction score
5
Location
oklahoma
Came up with cylinder 2 misfire and some o2 sensor codes. Cleared and drove. It came back on we will see what it will say today

operating a short multi-passenger vehicle
 

tonydiv

technical advisor
Joined
Sep 12, 2009
Posts
1,746
Reaction score
138
Location
Middle River, MD
If all the codes come back, fix the misfire first. The misfire may be causing the O2 sensor codes.
 
OP
OP
Notmyidi

Notmyidi

Full Access Members
Joined
Jul 28, 2012
Posts
107
Reaction score
5
Location
oklahoma
If all the codes come back, fix the misfire first. The misfire may be causing the O2 sensor codes.

No I know what's causing that, it may fix half of the o2 codes.

Got an exhaust leak to

operating a short multi-passenger vehicle
 
Top