luckyou03

iTrader: (8)

it climps for 2-300 rpm then falls on it's face. if it can survive the fall it SLOWLY accelerates smoothly when it hits about 30mph. then if i slow down, it'll do it all over again.

DeltaT

iTrader: (5)

The only thing I see that's odd in your scans is the 'knock count'. What made the number advance approx 15000 after startup?

Jim

luckyou03

iTrader: (8)

i do have an exhaust leak

blkchevyz

sorry its taking me awhile to look at this... laptop went to ****.


i dont really seem much different between the two file. timing was changed a little from the 600-800 and in the higher rpms.
fuel looks pretty much the same

did you tell the tuner you were running higher then stock fuel pressure? the performance enrichment(wot) is set low on both tunes.
i havent went through the whole tune yet, so i might be missing why he did that.


oh and looking and your closed loop scan, you got some crazy o2 problem... ones maxed out lean the other rich.
might want to check and make sure you didnt burn those wire.
with them being that far out, no wonder its running like ****.
does it run ok when you first changed the tune and fire it up?

blkchevyz

also your iac count is maxed out. that means your engine needs more air, and the idle air control motor cant open up any more to let more air in.

your throttle body should have a set screw you can adjust to open the blades up alittle. i would open that till you get the count down to under 100.
but this is going to cause another problem. your tps sensor is already a little on the high side, and this is going to make it worse. you might have to slot the sensor bolt holes so you can adjust it back down.

i think your suppose to be around .60volts

luckyou03

iTrader: (8)

the car is drivable while cold but as soon as it warms up, i have major problems.

i recently did install a holley, and have hear of people having to slot the tps or drill it for more air. i have a major exhaust leak which i think is causing the 02s to ask weird. i have the emissions pluged on the headers but i can feel air being pumped out of them. The car is loping like i've never hear it before! idling at 4-500 rpm on weird 02 readings... sound badass but to bad it wont drive. i'll get the headers plugged better, then check the 02's and fix the idle. i will go from there. thanks guys!

Honda Hunter

iTrader: (8)

everything blk said is right on. He pretty much has you on the right track. You were throwing me off when you kept saying the problem was from tune to tune. you should be ok after addressing the issues mentioned above.

dhdenney

iTrader: (53)

That's what I thought he was experiencing--a high knock count from the rockers, but it seems y'all have it going in the right direction.

blkchevyz

get it running any better?

1994Z28Lt1

iTrader: (1)

did anyone else notice the very low battery voltage while the car was running in the last pic with the car in closed loop the voltage is sitting at 10.10 volts which is really low and can cause problems in itself

blkchevyz

i was figuring that was from the 450 rpm idle.

infinitebird

iTrader: (11)

definitely sounds like an O2 sensor problem

luckyou03

iTrader: (8)

i plugged the emissions leak, slotted the tps (haven't checked voltage yet) and i screwed the throttle body screw all the way out to MAX. The car will idle around 600-700 now instead of 4-500, but still no where close the 950-800.

Car is still driving the same, really bad! I think it's the opti.

I check the wires, none burnt because i have taylor otvc wires. I pulled the valve covers and everything looked and felt tight.

speed_demon24

iTrader: (6)

I'm gonna have to guess and say its your 02's, they have a HUGE split between them, your car looks like its running lean as hell on the left bank. I'de pull your plugs and see how they look to be sure.

luckyou03

iTrader: (8)

I'll go pull em, and take some pics.

I have one of those auto stethoscopes, and I used it to listen to the injectors. all of them seem to be clicking away.

blkchevyz

you might want to try and just unhook your o2 sensors and see how it runs. it will throw a ses light though.

luckyou03

iTrader: (8)

i'll try that first. I have long tubes so i can actually get all my plugs out in about 30 mins, unlike my old shorty headers

luckyou03

iTrader: (8)

I unplugged the 02's and it does drive a little better. It has heavy vibration at the same rpm that it used to studder and die. i'm gonna go pull the plugs when it cools down.

It backfires like crazy when i let off the gas at higher rpms!

infinitebird

iTrader: (11)

replace the O2s then and see if that improves it.

Backfiring a lot when letting off is normal, especially with headers.

luckyou03

iTrader: (8)

while i'm waiting for it to cool down, i thought i'd upload some vids so you guys could here a cold startup of a lt4 hotcam at 4-500 rpm

cold start up
cold cold idle