Hesitation/Surging
06-24-2012, 06:09 PM
#1
Thread Starter
Join Date: May 2012
Location: CA
Posts: 6
Hesitation/Surging
How goes it everyone. so i have a surging/hesitation issue. ive posted the same issue on here before but never really got any good answeres, im hoping to find someone that has had the same issue. i have a 02 4.6 with about 90k on it. over the past couple months ive developed this surge like feeling upon acccel. so i pulled the fuel filter and thing was filthy... changed it. problem still exists. i have no DTC to go off of but i pluged in my scanner anyways to read my PIDS. eveything looks norm. so i figured its gotta be ignition related. maybe a shotty plug or craked boot and spark is grounding to head. so i changed all my plugs w/motorcraft plugs and new rubber boot and springs. problem is still there. im really at a loss. the best way to discribe what im feeling is, is when i drive its a loss of power with a surging type of feeling... like a misfire.
side note: just got her smogged yesterday and she passed with flying colors. my emmisions were extremely low! so now thats kinda telling me maybe its not a misfire. obviously im getting a complete burn to have such low readings. please help. any and all logical feedback helps. thank you.
side note: just got her smogged yesterday and she passed with flying colors. my emmisions were extremely low! so now thats kinda telling me maybe its not a misfire. obviously im getting a complete burn to have such low readings. please help. any and all logical feedback helps. thank you.
06-24-2012, 10:34 PM
#4
Thread Starter
Join Date: May 2012
Location: CA
Posts: 6
MAF was one of the first things I checked. Its clean and voltage is normal and readings are normal. Air filter is pretty new. i pulled and checked that too and its not clogged. the damn thing is still pretty white.
06-24-2012, 11:30 PM
#5
3rd Gear Member
Join Date: Jun 2011
Location: East middle of no where, WV
Posts: 585
Have you made sure you don't have vacuum leaks anywhere? Including hard to find spots like around where the intake meets the head, or where the injector goes into the intake, or the throttle body meets the plenum, plenum to intake...basically any tube that's not wires or fluids coming off the engine?
06-25-2012, 06:29 AM
#8
2nd Gear Member
Join Date: May 2012
Location: NY
Posts: 482
Do you want the help or not? You claim to have come here before and asked. Never had gotten any good answers. That is funny since you have made a total of 4 posts. But I won't get into that. Have you really eliminated the vacuum leak or are you just assuming because it idles fine?
06-25-2012, 10:52 PM
#9
Thread Starter
Join Date: May 2012
Location: CA
Posts: 6
Do you want the help or not? You claim to have come here before and asked. Never had gotten any good answers. That is funny since you have made a total of 4 posts. But I won't get into that. Have you really eliminated the vacuum leak or are you just assuming because it idles fine?
06-25-2012, 10:58 PM
#10
Thread Starter
Join Date: May 2012
Location: CA
Posts: 6
yea bro, i checked the gap before i installed them. im starting to lean towards coil/coils aswell. that was my original diag but went with the cheaper route first. ive just never seen a coil misfire with out a DCT being thrown. looks like AMERICAN MUSCLE her i come.