intermediate miss at idle

[juspassinthrough]

Hello new here got a 2002 ram has intermediate miss at idle in park when engine is hot have not owned truck long when i bought had this miss put fuel additive in it it stopped drove it 500 miles no miss put exhaust on it and chip drove 1000 miles no miss added fass pump and fuel gauge got 20lbs pressure starting and at idle 75mph down the road 17lbs month later miss again if you pull in and park while at idle it will miss turn engine off for few minutes start up no miss drive five miles return home park it miss again so this comes and goes to to shop mechanic put scanner on it said no codes he said it was vp maybe but iv read where several has had similar problem changed injectors and vp still have same miss my brother has a 2000 or 2001 he had similar problem it was some kind of adapter out by the ecm or computer by air box he tried to explain to me but did not understand maybe some one here not about this I'm not oppose to buying a vp but i don't want to throw money away if not needed ( could it be a ground have checked them for being tight but did not pull lose and clean yesterday while missing push brake down miss stop could it be apps sensor truck runs great gets 18 mph ) also had problem with shifting back and forth at 45mph but cut hot battery cables of soldiered new brass ends on fixed that problem but did not do the grounds. Cable was corroded under the rubber . Sorry for the long post but tried to explain best i could thanks.

[Mopar1973Man]

2 hours ago, juspassinthrough said:

Hello new here

 

Welcome to the family...

 

2 hours ago, juspassinthrough said:

has intermediate miss at idle in park when engine is hot

 

I'm going to bet the injectors are worn out. Fairly typical sign you could pull the injectors and have them pop tested but most just replace the injectors if they have over 100k miles. What happens is the pop pressure gets to low and the injectors get pissy and the fuel will not ignite if the fuel is not atomized. So you get a miss. With a cold engine there is added throttle and timing as high as 20* BTDC but now a warm engine there is much less throttle and timing is a mere 12.86* BTDC so is more so up to the injectors to keep idle state but the spray is crappy so the miss happens. 

[Dieselfuture]

Making sure all grounds, alternator, batteries in good shape is always a first step on these trucks. Good lift pump and gauges that you have is also a good thing. I had a miss and was getting ready to change vp but it ended up being between injectors and ac noise. Did diodes but ac noise was still not acceptable,  then did armature and brushes and it was much lower, I think at idle with accessories off and grids not cycling I now have around  .03vac if I rev it up it will still climb some maybe .07 or so but it's not causing any ill effects. Don't even bother with part stores for a new alternator unless they have a genuine denso, bosh I believe is discontinued. You can get them on line for 120-140 bucks. 

Is your miss at certain rpm or mph or just random. Mine was close to 2000rpm and around 65mph 

[juspassinthrough]

Will change injectors soon how are the bosh rv 275 marine injectors . And thanks.

[Dieselfuture]

If you're not going to be playing with the truck like most and just keep driving it then rv275 is the way to go, imo. Just make sure they're genuine Bosch, and you don't have to send yours in as a core, keep them for future to trade for whatever you decide if you ever get quadzilla with v2 tuning. If you get injectors make sure to get crossover tube orings, most injectors will come with new copper washers and orings. But you'll still need orings for crossover tubes.

[dripley]

The rv's are nice. I drove mine for 3 years or so with them alone and the truck did fine. Got a little boost in mpg to boot. The extra power of a chip is nice dont get me wrong, but for the money they are great.

 

I had to come back and look since I realized this is in 12v section and you have 02. You can go to your profile and fill out a signature that will appear at the bottom of each post. Put your truck info in it. 

 

And welcome to the farm.

Edited January 7, 2018 by dripley

[Mopar1973Man]

On 1/7/2018 at 1:30 PM, dripley said:

I realized this is in 12v section and you have 02.

 

Thanks, Dave I moved it over... I didn't even notice. 

[bigfish95971]

Mine had an intermittent miss at idle  with 550k on it.  Was a bad injector. But check for AC from alt(due to trani issues too).  Also check the Edge by removing for a bit..

[juspassinthrough]

update changed injectors miss gone put 50 hp injectors in fuel mileage 14mpg not real happy with that but life goes on.

[Dieselfuture]

Did fuel mileage go down hill right after changing injectors or was it like that always, if it was like that before could be a sign of a wore-out VP

[dripley]

You beat me to that one @Dieselfuture. Same question from me.

[bigfish95971]

650,000 MILES! this past week

Mine 99 2500, 53 block, lilt pump in tank now. 650k mi today. Afe filter cleaned once a year whether it needs it or o=not.  Same with an oil change.  up to 30k.  Several years of constantly watching alt AC and lockup issues, One ECM about 3 ev44's, no issues since lift pump to tank. Rebuilt front end mostly once and several track bars until Good Moog problem solver.Engine or head never out, valves adjusted twice,  one radiator leaked.cleaned external twice+two sets of starter contacts and one brush job.

Couple of trani output gears in to the TC.  NO other hard parts for trani.

Nw that replaced the Tappet cover and Vacuum pump seal and sleeve again and controlled most leaks, not not more thant w spots of anything, pan seeps but never off.

Uses Walmart oil from major mfg in Texas,  Uses about a quart in 1000-2000 miles.  GETS 17-21 MPG.  DRIVE IT LINK A GRANDPA EVERY MINUTE.  SELDOM OVER 54-62.  SEMI'S DRAFT NICELY.

[Dieselfuture]

@bigfish95971 @Mopar1973Man can you copy and paste this in the ml/km thread

[bigfish95971]

Copy and post what every you like of mine if ok with mike. (cut and past)

[Mopar1973Man]

6 minutes ago, Dieselfuture said:

@bigfish95971 @Mopar1973Man can you copy and paste this in the ml/km thread

 

Sure knock yourself out. Easier just to copy the link and paste it to someone. 

[juspassinthrough]

8 hours ago, Dieselfuture said:

Did fuel mileage go down hill right after changing injectors or was it like that always, if it was like that before could be a sign of a wore-out VP

after changing injectors before got 18 thanks

 

[Dieselfuture]

Something ain't right, I would be checking for possible boost leaks. Did it get model laggy on take off and more smoke. Little smoke is ok with slightly bigger injectors, but if it takes longer to spool turbo you probably have a boost leak.

[juspassinthrough]

Hello it smokes a little at start runs good i have 4 inch straight exhaust edge ez sump in tank fass pump 1-2 inch lines new 50hp injectors run overhead going to install bhaf tomorrow had a fram in it i no stupid ill check for boost leaks i notice bottom of turbo had oil on it i can't here turbo when running truck. Also this is stupid also order fuel filter from genos garage would not fit when you put filter in cap won't screw down had a 99 ram same way finally ordered a updated filter housing no more problems like someone changed caps this 02 is same way my brother has a 01 filter for his would not fit he had a extra so i got a filter from international dealer it worked but was shorter any ideas sorry for long message but don't understand both trucks had same issue with filters oh trucks idels 20 lb 15 down the road thanks for info ill let you no on boost.