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WTF is my car doing?

2.8K views 23 replies 11 participants last post by  RTdodgeneon  
#1 ·
its been doing this since i got it running. i have swapped 2 coils, 4 wire sets, changed the spark plug gap from .35 to .38 to. 30 and still no changes. im running stock coil with granatelli wires now. with stock copper champions and has the hiccup at idle the most plug while having it held at a rpm under no load just like this video


just like that guys car but maybe a little more than him.

As for my mods i have a stage 2 kit no toys, 15lbs, stock coil with ganatelli wires, Mpx bfmic, 3 in 02 and dp, ported intake ports, hard pipes, bwoody CC with mpx cv, PCM boost, pretty much a stock stage 2 kit with simple bolt ons. so maybe its an injector? or teh plugs? was thinking of NGK iridiums, but wanted to get some professional suggestions before i throw money in it
 
#3 ·
also the vacum at idle is 20 and tried to boost leak test with my new mpx one with the key on and only leaks from the holes on the MOPAR BOV. what am i doing wrong here?
 
#4 ·
po522 and po663
 
#5 ·
one is for the key which is no changes and the other is for the stock oil sending unit cause i have it off due to my Mopar oil psi gauge
 
#6 ·
So it ran fine till you cleaned your injectors. What did you do to clean them or who did you send the to?
 
#7 · (Edited)
My car kinda has that little pop on the idle (hear in the exhaust and inside), but i am pretty sure that is normal. The mid range breaking up still sounds like ign? You sure all the parts swapped are ok and in working order?
 
#9 ·
it drives okay, just idle and no load rpm it does it and is VERY annoying to me. i looked on my scan gauge at the throttle % and voltage stayed the same so maybe a cam or crank sensor?
but ive noticed a little more lately is sometimes when i rev it up or givr iit throttle it bogs down or poops feels like
 
#10 ·
I would run NGK 4306s NOT iridiums @ .35 gap. when @ idle try to wiggle the TPS and IAC wires to see if there is any change in idle sound.
 
#12 ·
so ask for 4306 or is that a part #?
 
#14 ·
lol ill do that and see how it goes
 
#17 ·
so an update is that i ordered the plugs for tomorrw but just wanted to update with what the hell its dong now. If i go to rev it or pedal it the car sounds like its falling on its face or running way too rich and boggs when i do that, and sometimes when i do that it builds boost. i reset the pcm a few times after i adjusted the WGA and still does it. seems to get worse. also what should i be looking at on my scan gauges? i looked at throttle % and throttle volts and its consistant and looked at timing advance and spark i believe but they change when it does the lame mis fire/ hickup. so what should i be monitoring and ill record it and add it here with the results.
 
#18 ·
a small amount of popping in your exhaust at idle is perfectly normal. some injectors do it more than others and some not at all. my RC 750s do it pretty often and occasionally i get a p0301 (misfire cyl 1) cause i think that one needs cleaning. but yeah, you def got some problems there ^^ but glad to hear everyone else say the misfire/popping at idle is normal.
 
#19 · (Edited)
#21 ·
yes on the plugs and the coil pack
 
#23 ·
the entire car only has 2k on the rebuild and has new o rings, but i will check them. and when i boost leak test it do i have ignition on and open the TB right?
 
#24 ·
so i noticed that when it does bog the rpm stays there but boosts. so possible crank, cam sensor???? Anyone else have the problem?