[Steve91T]

I'm mostly kidding but here's why I ask. My dad noticed his 335d was a little sluggish. He put some Lucas fuel injector cleaner in it and it made a noticeable difference. My E36 M3 has 210,000 miles on it and for a while now it ran like crap until fully warmed up. It would drop a cylinder or something, but since it ran like a champ when at operating temp, it didn't bother me very much. Anyway, after only 40 miles with Lucas in the tank, it doesn't do it anymore. Same with my boat and even my 7.3 Powerstroke is running better.

So my 97 SS has a junkyard LT1 in it. It only has 116,000 miles on it but it's been sitting for years. I recently got the car on the road. It has great oil pressure, doesn't smoke, but runs very rough. The fuel injector cleaner is helping but I think there's a compression problem. Is there anything on the shelves that can help with that? I know there are products that say they can, but anything that actually works like the fuel injector cleaner? My goals for this engine is to do a few track days with it and sometime next year swap an LS1 into it. I just need to get by for about a year or so. I only paid $380 for engine so I'm not too worried about it.

[BryanL]

Don't know if there is a good aftermarket fix. I just remember reading on a forum about the repair costing some guy $9k and people were trying different ways to come up with blocking/deleting the egr/dpf and keeping it from going into limp mode. I have seen the tune but it's just a piggyback system I think on the fuel rail or somewhere in the engine compartment so not a real tune but just ups the pressure or boost maybe.
I have never driven one but if I end up moving and have more of a commute then I think this would be the best setup.

[Steve91T]

Don't know if there is a good aftermarket fix. I just remember reading on a forum about the repair costing some guy $9k and people were trying different ways to come up with blocking/deleting the egr/dpf and keeping it from going into limp mode. I have seen the tune but it's just a piggyback system I think on the fuel rail or somewhere in the engine compartment so not a real tune but just ups the pressure or boost maybe.
I have never driven one but if I end up moving and have more of a commute then I think this would be the best setup.

So I talked to my dad over the holidays and he said his car had like 36k miles when he notices it getting sluggish and eventually the check engine light came on. It was under warranty at the time, but the repair would have been about $1500. They have to take the intake manifold off and have it blasted with walnut shells to remove the carbon. The mechanic told my dad it's a problem with direct injection engines, gas or diesel (I don't buy that). The fix is more spirited driving (IMG:http://www.frrax.com/rrforum/style_emoticons/default/smile.gif) So he's going to run some Lucas fuel injector cleaner once in a while and open it up more often. The problem is the thing pulls so hard you run out of room quickly. It's a good problem to have.

Anyway, he loves it and has no plans on getting rid of it, even with this problem.

[bubba353z]

So I talked to my dad over the holidays and he said his car had like 36k miles when he notices it getting sluggish and eventually the check engine light came on. It was under warranty at the time, but the repair would have been about $1500. They have to take the intake manifold off and have it blasted with walnut shells to remove the carbon. The mechanic told my dad it's a problem with direct injection engines, gas or diesel (I don't buy that). The fix is more spirited driving (IMG:http://www.frrax.com/rrforum/style_emoticons/default/smile.gif) So he's going to run some Lucas fuel injector cleaner once in a while and open it up more often.

It's a legit issue. With direct injection there is no fuel in the intake system to keep the intake runner and valve clean. The PCV system pull the oil into the intake where it bakes / builds up with nothing to clean it out. Adding fuel injection cleaner will have no effect on it, since it won't get where it's needed.

Mini is having this issue, and a lady that works for me had to have in done on her VW. With more engines going to direct injection, it's going to be a growing problem....