any more suggestions?

[Psych0matt]

I jb welded that egr, and although that needed to be done, it didn't really help too much. the engine seems to run just fine, and it idle's at the normal it always has, maybe 10 or 20 more sometimes, but that's nothing. it doesnt idle irratically, and for the most part, the power when driving is constant, it just lacks. it seems to drop off a bit more up toward the higher rpms, and it will occasionally hesitate on a constant throttle. vacuum lines all appear to be intact and good, and the timing should be right on. anything else i should look for?

[slick]

Clogged cat maybe? I think I read in another thread that your SES light isn't working, which means that your ALDL port probably isn't working either(found out the hard way that they are tied in together).

[Psych0matt]

well, the only reasons my light wouldnt work are either

 

a) its in the wrong spot on the cluster llug (UB3 added), or

b)the light bulb is possibly burned out

 

I'm probably going to run up to autozone and buy a bulb for it and see if i cant figure that part out, and then go from there. and I have also considered that the cat is becoming clogged. i'll have an update soon hopefully

 

EDIT:

Slight update. figured out that I had a wrong wire in the SES slot, and so that's all fixed, my SES light works, but im not throwing any codes (at least not while it's running in the driveway) maybe I'll look into the cat thing. i wish someone close could just lop it off and throw a pipe on it for the time being

 

[Crazy K]

well.... not to sound bad... but you do have the 96 block with the 94 intakes.... could that be the problem? can they be restricting or interfering with the intended airflow on the 96 heads and stuff?

[Psych0matt]

well.... not to sound bad... but you do have the 96 block with the 94 intakes.... could that be the problem? can they be restricting or interfering with the intended airflow on the 96 heads and stuff?

 

it was fine for the first two months, though

[Crazy K]

ok.

 

well.... could your open EGR pipe have sucked crap into the engine?

 

does the exhaust smell bad? rotton egg bad?

 

is the cat glowing when hot?

 

how about

fuel injector cleaner?

fuel filter, airfilter?

 

when's the last time you checked the plugs? make sure they're not fouled.

[Crazy K]

even if the plugs are new, an engine problem could have fouled it out.

 

say..... how about your ground connections for the block? are they tight?

[Psych0matt]

no bad smell, cat doesnt seem to be glowing or anything, ive done injector cleaner, fuel filter was last summer, air filter is a k&n... I'll check my spark plugs, because I did seafoam it to see if that helped anything, but that could have potentially fouled something

[Crazy K]

I will be in town this weekend again! if you are around matt.

[Mach 5]

Rev and hold the engine at different speeds. If the EGR valve diaphram moves, it is getting backpressure from the exhaust and opening the valve and letting the exhaust vapors into the engine.

If so, try disconecting the EGR vaccum tube from the throttle body and plug it. Do the same to the Throttle body opening. The engine shouldn't do this anymore and power should be back again. This could result from a few things. A bad EGR sensor, clogged exhaust or something along those lines. When my car did this, I found paper in the muffler. This may or may not work.

[Psych0matt]

I will be in town this weekend again! if you are around matt.

 

thursday evening im free, and friday til about noon. you have the number

 

 

Rev and hold the engine at different speeds. If the EGR valve diaphram moves, it is getting backpressure from the exhaust and opening the valve and letting the exhaust vapors into the engine.

If so, try disconecting the EGR vaccum tube from the throttle body and plug it. Do the same to the Throttle body opening. The engine shouldn't do this anymore and power should be back again. This could result from a few things. A bad EGR sensor, clogged exhaust or something along those lines. When my car did this, I found paper in the muffler. This may or may not work.

 

so youre saying basically remove the vacuum line between the TB and the egr? This definitely sounds like a possibility

[slick]

It's always recommended to replace the plugs after running seafoam. Just be sure to gap them correctly also.

[99RegalGS]

Rev and hold the engine at different speeds. If the EGR valve diaphram moves, it is getting backpressure from the exhaust and opening the valve and letting the exhaust vapors into the engine.

If so, try disconecting the EGR vaccum tube from the throttle body and plug it. Do the same to the Throttle body opening. The engine shouldn't do this anymore and power should be back again. This could result from a few things. A bad EGR sensor, clogged exhaust or something along those lines. When my car did this, I found paper in the muffler. This may or may not work.

Matt's car doesn't have a vacuum EGR. It has the Digital EGR. So this doesn't apply.

[slick]

Did you verify you had no codes by just looking for the SES light or did you try to pull codes? There are a lot of codes that don't throw an SES light.

 

 

[Crazy K]

sorry matt I get there on friday evening, leave sunday sometime, unless otherwise informed...

[Psych0matt]

SO, I did in fact throw a code on the way to work this morning, but only after i got about halfway there (5 minutes or so into the drive) and I did not have a code thrown on the way home. If I could find someone around to scan it I might be better off, but I know at least autozone can't scan a '94

[slick]

Oh damn, you have the OBD 1.5, don't you?

[Psych0matt]

Oh damn, you have the OBD 1.5, don't you?

 

yuppers

[94CutlassXtreme]

Does the hesitiation on constant throttle happen at like 50 mph on cruise? Kinda sounds like it could be a tranny issue, moreso with the TC.

[Psych0matt]

Does the hesitiation on constant throttle happen at like 50 mph on cruise? Kinda sounds like it could be a tranny issue, moreso with the TC.

 

not on cruise (don't use it save for long trips) and it happens randomly speed wise

[94CutlassXtreme]

Does it buck and sputter when it acts up?

[Psych0matt]

Does it buck and sputter when it acts up?

 

somewhat, but its more like when i start accelerating (but not only when accelerating), itll just all the sudden have only like 60% power, or something. its really hard to explain, which is why I'm at a loss for what else to check. Also, it usually idles pretty normal, at least when its cold, although sometimes it will start up and just idle real low and want to stall out almost unless i hit the gas once to get it up a bit

[94CutlassXtreme]

Very, very odd. Follows the symptoms of sooo many different things. I'd check the upstream o2, a lazy o2 would cause the f'ed idle, lack of power, and hesiation. And it wouldnt necesarily throw a code right away. o2 sensors dont just fair, they get lazy. You could check that with a mulimeter. An o2 sensor operative by swithing between 200mv (rich side) and 800mv (lean side) When it gets lazy it starts to favor rich more and more. How's your gas mileage?

[94CutlassXtreme]

Oh yea and it makes sense that it would run mostly normal cold too. The o2 doesnt come on line until around 850-950 degrees anyway, and until then then engine runs off a preset map programmed into the PCM.

[Psych0matt]

Ok, so I picked up an O2 sensor, but it started raining on the way home. I'll give it a while, both for the rain to subside and for the engine to cool down (hot exhaust pipe + white flesh don't mix too well), and I'll see if i can get it in, and if that helps anything. I'm really hoping that this fixes it, it seems more and more likely to be the problem, as I threw another code this morning, but not again on the way home.