I suspect you still have an IP issue.

While its certainly possible the IP is the problem, without sufficient air, all the fuel in the world won't help. The fact it gets to 80mph suggests its getting quite a bit of fuel.

Does the 95 have an MAF or is air strictly controlled by the resonances flaps?

I don't remember it having a MAF.

How does it idle? The one that I delt with that was damaged where the cylinder fits down inside the barrel of the IP idled like crap.

I dont think it has a MAF, if it did, where would it be located? Under the IM? I have two manual flaps inside the IM. As far as the idling goes, well, its almost as smooth as it was prior to doing any work, but still a bit rough. Im also going to the the diesel purge, as I noticed there was some crud inside the IP fuel when I was chagning the fuel lines. The car has 186k miles on it, and as fra as I know the has never been done. Although it idles a bit rougher than before the work, it does feel as powerfull, if not more powerfull to drive than before the work, and the gears change alot smoother than before. So I will see what it will do after the purge and report back here Thanks Guys

I may have missed it, but I didn't see anywhere that you changed the main fuel filter. If you haven't, do so. On my '95 as the filter gets progressively dirtier, the car will not pull like it should - most easily noticed as a sort of hesitation and unwillingness to rev to max RPM. It can get bad enough that you can not reach normal freeway speeds unless you accelerate very very slowly.

If you floor your car in Drive (after the car is suitably warmed up, lube oil to normal temp, etc.) and make sure the kickdown switch is engaged, it should rev to something like 4800 - 5100 RPM before shifting. If it is not hitting near that RPM, the main fuel filter is clogged, I guarantee it. If it hesitates in shifting, or shifts harshly or kicks down at odd rpm, same thing.

I give my car an "Italian tuneup" once a week, even with 275K on it. Generally pull away from a stop gently and progressively floor it, keeping it matted thru 1st - 3rd gear. After that it's going too fast on local roads... Will blow some smoke, but it's doing the job of keeping the gunk from building up, IMHO.

Rgds,
Chris W.

Chris,

No I havent changed main fuel filer yet this year, but it was changed late last year. The fuel filer is not an issue, as the car was working just fine before the IP work, sure it smelled of diesel, but thats what makes it special. I took it to work doday, and I have about 10mi highway stretch in my commute. I got it up to 80, but it wasnt as easy as it used to be. I still notice a bang on some upshifts, 2-3rd mostly, although its nowhere as loud as it was right after I did the IP work. I have ordered two cans of diesel purge today, and will clean the system as soon as I get this stuff. I am praying to the MB gods that this stuff will solve this issue, and point back to the IP. So far my efforts of locating a used IP are fruitless, and I am not quite ready to fork out the money to have this one rebuilt or pay the dealer for a refurb. I will keep you posted.

Thanks

I have noticed a puff of black smoke in the exhaust on start up, so I am guessing the mixture is too rich. I am going to check the EGR valve, and also I am still waiting for my Diesel Purge, hopefully it will come in on monday. The other problem I am facing right now, is that it doesnt start. My driveway is up the fill, and if I park with the nose up the hill, it wont start. As soon as I roll it done the driveway, and level the car off, it starts up within 10 sec of cranking. I replaced all the plastic fuel lines, and as far as I can tell there is no air in the lines. Any ideas?


Thanks guys

Check the pre-filter oring again. You might need to crimp the hold down washer to get more down pressure, or your prefilter might be cracked and/or have a mold flaw.

If you smell ANY diesel, check ALL the orings again. There is obviously a leak somewhere as it is hard starting.

Diesle Purge, did smooth out the idle, but still not smooth enough, ( engine shaking at idle, and white smoke at about 3k rpm's) guessing its pointing to unburnt fuel. I took the cover off to get to the injectors, and started loosing the fuel lines on the injectors one by one. when I got to #4 it made no difference on the engine performance. I am wondering if this is going to be the IP's fault, as the heart beat on that fuel line is alot weaker than the other 5, and it was that cylinder on the IP that didnt sit correctly the first time I did the vlaves?? When i did crack the fuel line on all the injectors, fuel was squirting about the same from each one. Is there any other way to narrow it down as to weheather its the injector or the IP? Thanks for your help.

see post #9
 

I hate to keep harping on it but you are experiencing the same thing I did. It is really not that hard to remove/install the ip on that application. Do a search on here and you should be able to find all kind of reading on the subject.

On the other hand if you get tired of messing with it let me know. I am in the mkt for a diesel w124:).

Jim,

Would you happen to have a drawing / picture of the IP's guts? After I took those valves off the second time, the cylinder was sitting at the same level as the other 5. so I would like to know what I am up against. also, you siad it might have broken, if thats the case, where could I get a replacement, or thats something that i cant change myself?


Thanks