Sign in to follow this  
btracing

Engine Miss Help?

Recommended Posts

hi all i have a 2001 is 300 that has developed a miss. the miss only occurs from around 3800 to 4800 rpm but it is a constant miss between those rpm anything lower or higher than that the car runs fine? it has around 103000 miles on it. the cel hasn't came on. any help would be appreciated. thanks.

Share this post


Link to post
Share on other sites

Which cylinder? Did you check your plugs?

Share this post


Link to post
Share on other sites

I did change the plugs.not sure which cylinder it is as there is no cel or fault codes and it only does it between those rpm?

Share this post


Link to post
Share on other sites

Are you running stock? or do you have any mods?

Share this post


Link to post
Share on other sites

its all stock... i really don't think it could be a cylinder problem. if it was that i would think it would do it all the time?? i'm thinking its gotta be sensor of some kind but i don't have a cel on. so i really don't know??

Share this post


Link to post
Share on other sites

I wasn't thinking cylinder, I was thinking maybe fuel injector, maybe gap to large to small on one of the plugs???? Maybe one of the coil wires are bad??? Maybe dirty 02 sensors and IAT/MAF ??? (Not really sure this would be the case, but you may have a combination of any of these, which could be the causes.)

Do you have an ODB II scanner?

Share this post


Link to post
Share on other sites

i finally got a cel on scanned it with a OBD2 there is 3 codes in it p0440 p0441 p0446. any ideas? thanks in advance. brandon

Share this post


Link to post
Share on other sites
i finally got a cel on scanned it with a OBD2 there is 3 codes in it p0440 p0441 p0446. any ideas? thanks in advance. brandon

Hmm, those are emmissions codes. If I remember right, those usually lead to the gas cap, or ventalation canister for the fuel tank. Try removong your gas cap, then put your cap on the opening, trun it counter clockwise until you feel the lowest point, then turn it clock wise until it clicks 3 or 4 times. See if that takes care of the cel.

Share this post


Link to post
Share on other sites

I have the same problem with my 01 is300 it started around 35-45k miles but I now have 70k. my miss hits around 4000 till about 5000 and it's like a wall aka rev limiter and once its past this point it good. no mil light, good milage, shifts good I'm thinking wires or coils but it could be something else I just hate to take this to a garage and get screwed when it's something I could fix if I knew what it was. Also I want to add I notice it misses worse on dry days aka like static discharge and seems better on humid days altho still misses. I thought fuel also but since it seems to pull good from 5k to 6k I can't seem to think it would be a fuel issue aka injectors or pressure.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this