5.7 eng shake at idle

ike43 · Aug 6, 2010

just bought a 2006 15004x4 wondering if intermittant eng shake very slight but can feel it in truck is normal for the hemi or could it be a miss? changed plugs and air filter and ran 1 bottle of inj clean through already but still there , any suggestions?

KGBIGCOUNTRY · Aug 6, 2010

Has it thrown any codes and what does the tac do during the shake? Do any lights come on the dash? Mileage and possible dirty TB. Kinda hard to say without more info. How does the truck also do around town?

ike43 · Aug 6, 2010

no codes no lights, and tach dosent move that i can see but i know its a hemi but it does seem to be excessive on fuel no smoke either maybe the tb is dirty ? its has 60000 km or approx 45000 miles on it

KGBIGCOUNTRY · Aug 6, 2010

What do you consider excessive on fuel? Normal ball park is around 15 MPG on these things. I really doubt the first owner changed the plugs but I could be wrong. They can be a pain to change without the right tools but can still be done. Normal change is 30k or 35k cant remember at the sec but they can go longer if good fuel is ran all the time.

ike43 · Aug 6, 2010

i havent calculated the mpg let but i estimate around 10-12 mpg ,i changed the plugs myself not too bad but i have the tools the old plugs gaps were .050-.055, but new plugs didnt make a diff, i havent looked close at the tb yet do they get that dirty easy

KGBIGCOUNTRY · Aug 6, 2010

The can but shouldnt be causing alot of your issues, if you do clean it use brake cleaner only and be mindful not to spray alot near the ectertonics. That milage seems low wonder if anything funky is goin on with the injectors.

KGBIGCOUNTRY · Aug 6, 2010

KGBIGCOUNTRY said:
The can but shouldnt be causing alot of your issues, if you do clean it use brake cleaner only and be mindful not to spray alot near the electronics. That milage seems low wonder if anything funky is goin on with the injectors.

sorry had to edit and did it the wrong way

ike43 · Aug 6, 2010

on the hemi when cleaning the tb should use tb cleaner and spray with eng running or can you clean it with brake clean eng off then start after?

AWE Daniel · Aug 6, 2010

ike43 said:
on the hemi when cleaning the tb should use tb cleaner and spray with eng running or can you clean it with brake clean eng off then start after?

Get some non-chlorinated brake cleaner, works good and wont damage the finish inside the TB. Yes they do get dirty very easy. Check out what mine looked like.

After its clean make sure you calibrate the TPS, turn the key to run, let all the lights go out (the engine light will stay on). Press the accelerator all the way to the floor, let it up and turn the key back off.

ramhunter9 · Aug 6, 2010

make sure all plugs are gaped the same ... i think this is your problem .. i had a buddy with the same problem .. 3 plugs were not gaped correctly .

KGBIGCOUNTRY · Aug 6, 2010

The backside of the blade is what gets so dirty like in the pic posted above. Claning with TB cleaner is a 50/50 shot of jacking yours up. The TB cleaner messes up the electronics on these things.

ike43 · Aug 6, 2010

alright im going to try cleaning the tb this weekend , do i need to replace any oring or gasket when removing tb to clean?, also what do people think of adding a throttle body spacer?

AWE Daniel · Aug 6, 2010

ike43 said:
alright im going to try cleaning the tb this weekend , do i need to replace any oring or gasket when removing tb to clean?, also what do people think of adding a throttle body spacer?

No gasket, spacers are opinionated, some people like em, most dont

ramhunter9 · Aug 6, 2010

TB spacers are a big paper weight ... junk dont do it waste of money

Redtruck-VA · Aug 6, 2010

Remove the TB when you clean it.

Rumblebee#2331 · Aug 6, 2010

throttle position sensor can also cause this problem had it on a few vehicles, lowered mpg shuddering and surgeing or stalling at a stop and or highway, thats where I would go if it was my truck seen it happen a few times

ike43 · Aug 8, 2010

well i removed tb and cleaned, was a little dirty but not bad all plugs new and gapped at .045 champ copper, still has a very slight shudder at idle when cold but not noticiable after its hot but does happen occasionaly put another bottle of inj clean in it will see if it works

ramhunter9 · Aug 8, 2010

do you have a exhaust ???

mt truck does this at idle because of the exhaust rumbling ... could it be so easy ???

ike43 · Aug 8, 2010

no exhaust, :disgust:

KGBIGCOUNTRY · Aug 8, 2010

If you get a chance post a vid of what its doing.

5.7 eng shake at idle

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