spark plugs
06-21-2007, 09:26 AM
#1
Newbie
Thread Starter
Join Date: Jun 2007
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
spark plugs
Have a 1998 e-320 regular not 4 matic. Having a real problem diagnosing a check engine light that come on intermintent. Replaced egr valve, spark plugs, parts store recommended the bosch+2, spark plug wires should arrive today. Mass flow filter was replaced 2 years ago/dealer. Replaced 2 coil packs 3 weeks ago but found plugs under one of the new coils packs was/both plugs where fouled with carbon?. Please any help would be appreciated. Seems like I 'am rebuilding the car from the bottom up. Check Engine electronics light still keeps comming up and of course rough ideling. Car goes from running smoth as silk to really rough?. Will replace wires today/tomm when they come in mail. EGR valve also had lots of carbon. All other plug except the two burnning really clean. Any product to rid the system of carbon? could that be the problem? Thanks, Chuck
06-21-2007, 04:45 PM
#3
MBWorld Fanatic!
Join Date: Nov 2001
Location: Jacksonville Florida
Posts: 3,858
Likes: 0
Received 3 Likes
on
3 Posts
209/W210 Estate /W211 modded by MBENZNL
Have a 1998 e-320 regular not 4 matic. Having a real problem diagnosing a check engine light that come on intermintent. Replaced egr valve, spark plugs, parts store recommended the bosch+2, spark plug wires should arrive today. Mass flow filter was replaced 2 years ago/dealer. Replaced 2 coil packs 3 weeks ago but found plugs under one of the new coils packs was/both plugs where fouled with carbon?. Please any help would be appreciated. Seems like I 'am rebuilding the car from the bottom up. Check Engine electronics light still keeps comming up and of course rough ideling. Car goes from running smoth as silk to really rough?. Will replace wires today/tomm when they come in mail. EGR valve also had lots of carbon. All other plug except the two burnning really clean. Any product to rid the system of carbon? could that be the problem? Thanks, Chuck
How about a trip to the local AutoZone and have them scan the car for stored codes..Then One Could FIX it! NO More Guess Work
06-21-2007, 09:38 PM
#4
Newbie
Thread Starter
Join Date: Jun 2007
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
Missfire Rough Idel Have Had Numerous Code Review All Come Back Egr Valve !
Have a 1998 e-320 regular not 4 matic. Having a real problem diagnosing a check engine light that come on intermintent. Replaced egr valve, spark plugs, parts store recommended the bosch+2, spark plug wires should arrive today. Mass flow filter was replaced 2 years ago/dealer. Replaced 2 coil packs 3 weeks ago but found plugs under one of the new coils packs was/both plugs where fouled with carbon?. Please any help would be appreciated. Seems like I 'am rebuilding the car from the bottom up. Check Engine electronics light still keeps comming up and of course rough ideling. Car goes from running smoth as silk to really rough?. Will replace wires today/tomm when they come in mail. EGR valve also had lots of carbon. All other plug except the two burnning really clean. Any product to rid the system of carbon? could that be the problem? Thanks, Chuck
06-21-2007, 10:28 PM
#5
MBWorld Fanatic!
water/steam injection
steam injection for the carbon,but avoid hydro lock!google for how to do it,or find a local shop.
Have you checked for vacuum leaks?Which are a very common cause of the malfunctions you describe.
Find a shop with a good scope and run a test on your ignition system to see if it is doing as it should.Hate to say go to a shop,but as above you have spent alot of time with no results, so maybe this one is out of you're reach.
However i'd start with the leaks and get your own code reader they are only 49 bucks for an obd can 2 reader at harbor freight tools and worth their weight in gold.check the maf it could be bad but then it would show 70 and 73 codes,what codes did you pull with the check engine light either active or stored as pending if you have not erased them yet?
on a scope you can check the maf with these perimeters
High Lambda values at idle (lean air-fuel-mixture)
Engine hesitation at high RPM
Engine misfire at high RPM
Engine going into limp-home mode at high RPM
keep us posted and good luck
ohlord
Have you checked for vacuum leaks?Which are a very common cause of the malfunctions you describe.
Find a shop with a good scope and run a test on your ignition system to see if it is doing as it should.Hate to say go to a shop,but as above you have spent alot of time with no results, so maybe this one is out of you're reach.
However i'd start with the leaks and get your own code reader they are only 49 bucks for an obd can 2 reader at harbor freight tools and worth their weight in gold.check the maf it could be bad but then it would show 70 and 73 codes,what codes did you pull with the check engine light either active or stored as pending if you have not erased them yet?
on a scope you can check the maf with these perimeters
High Lambda values at idle (lean air-fuel-mixture)
Engine hesitation at high RPM
Engine misfire at high RPM
Engine going into limp-home mode at high RPM
keep us posted and good luck
ohlord
06-22-2007, 09:46 PM
#6
Member
Join Date: Mar 2007
Location: Toledo, OH
Posts: 194
Likes: 0
Received 1 Like
on
1 Post
88 535is, 89 318iT
sounds like an egr insufficient flow code, cuz nothing you replaced would fix that! i've had a few cars with that where we had to remove and manually clean all of the intake runners and egr pipes to clear. i had to show the owner of an Acura all of the carbon build up and what we had to do to clean it all out (injection cleaning only turned it to mush), or he would have never believed me.
without the codes, nobody can help you.
David
without the codes, nobody can help you.
David
