At cruising speeds with about 10% throttle doing 30mph or so my BLM's are sitting between 113 and 115, and the INT seems to average 130 to 135.

I'm posting a zip of the Datalog file so you can make what sense of what you want.

http://mywebpages.comcast.net/wjrneo..._datalog01.zip

Its a bit rich it about 1/3rd throttle, but at idle and about 10% throttle its horrendous. I've seen the BLM's dip into the 108 sitting at a stop light.

Obviously being Xmas I understand that just about everything for the next two weeks is packed full at least. But I'm willing to drive out for a full day and spent the $$ on gas and whatever else is needed to tune it.

Its been mentioned by a few people, and from other posts I've read that I probably need to adjust the LV8 tables. Right now I'm feeding it 87 octane gas becuase its not knocking at all. The knock sensor doesn't report anything, even at full throttle when the engine is around 200* according to the ECM.

 

I know I know I know!!! You're running rich

 

Duh!!

Its always rich. Also I don't seem to have much knock at all. I can probably advance the timing a bit more.

Its funny how the datalog starts with xxx amount of knock counts. Like the most recent one starts with 254 counts or something like that. But the car was just idling. And when I go WOT I don't get any knock at all. I know the knock sensor is working because I did get one or two knock counts in a WOT run.

BTW, as measured it took about 10 seconds to go from 70 to 100mph.

Also this is funky, no matter how far I push the pedal down I can only get about 90% Throttle position. Time for a new throttle cable? Or adjust the TPS?

 

lol

oh geez Bill

Start reading the stickies at the prom board 1 at a time and work from there :-)

We can get together one of these days if u get the crap u neeed to start burning too :-)

later
Jeremy

PS If your knock counter is pegging out then its knocking a whole bunch somehwere for some reason (or lots of falsies)

 

Don't advance your timing until you fix the rich condition. Get the fuel dialed in first, and then timing. Try dropping fuel pressure 2psi or so and see how it does then. Mess with the fuel pressure enough to get the BLMs as close to 128 as possible. Obviously, some of the values will be off from 128, so at that point, its time to start burning chips. THEN you can begin to mess with timing..


Oh, and don't worry, keep the cable for a while. I won't need it back for quite some time.

 

Oh, and as for the throttle... instead of using the pedal... with the engine off but key on, turn the throttle all the way open with your hand and see what the throttle % is reading.

With the throttle closed all the way, it should read .54-.55V on the TPS voltage, and at WOT, it should be above 4.2V. Closer to 4.3V on my car I believe.

If you can get 100% throttle by hand on the TB but not through the pedal, then a new throttle cable may be in your future.

 

oh yes and Bill dont advance the timing beyond the stock 6, might go 8 if your burning. I can guarantee it will be knocking more if u do :-)

Done it, been there lol

later
Jeremy

 

Fuel pressure is already at 38psi, I don't want to drop it below that. The injectors were ratied 24# at 42psi. A little math and 38psi is about as close to 22# as I can get with them.

How much lower can I go on fuel pressure before I start running into poor spray patterns.

Jeremy, any idea why when I start logging the knock counts are like 125, or 250, or some high insane number even though I've just started the car? But when I start driving I almost never get any knock counts.

 

I've had the same issue. I always figured it was from the starter cranking.

Drop the FP to 36psi. If it runs better, it runs better, who cares about spray pattern

Or you should just get a chip burned for 24# injectors..

 

ya that is a high knock count.. even when i was data logging with my tbi.. and shut it of and restarted it and everything it was really low... you have to be getting false knock from somewhere.

hey atleast you can still drive your car.. before we advaced the timing by blm's were like 109-113 when it went closed loop. then after we advanced the timing to 6 degrees, now when it goes closed loop it floods itself with fuel. right now i have the stock chip right now but i got my stuff form moates the other day and am going to soder in the adaptor soon so i can use flash chips.
dean is going to come over with his programmer and let me use it. then when jim gets home hes gonna go over some things with me so i have a clue how things work.. i will say that after ready the sticky's on the Prom board that it helped me understand some. maybe after i figure things out a bit more i can help you get your car running ok..

 

Arnt SVO injectors rated at a differend PSI than the injectors used on TPI cars?

Kevin

 

I wouldn't drop the fuel pressure on it. I don't know your setup too well but if it involves a stock prom tune and a cam I'm betting its rich where you're showing (down low) and going slightly lean up top, you'd rather be rich down low than even leaner up top. That's why you should leave the fuel pressure and tune the prom.

 

Nope :-)

SVO 24# require an inj constant very near 24# to work properly :-)

Installed in a stock car w/ stock chip theyn will be rich and drop blm's into the 110-115 range ...

later
Jeremy

 

I ddin't think it was a stock car? I thought he had some pretty decent mods on it? What size are stock 350 TPI fuel injectors 22?

 

Yeah, she's got a lot done to it. Though she'd perform alot better with a good set of aftermarket heads on her.

Mods are in the sig.