Hello I have a question about how to adjust the fuel mixture on my 2.2. I did a search but could not find much so I hope this is not a subject being repeated. Well back to my problem, we built a 1996 .30 over 2.2 with the 2200 98-2000 piston conversion and the 1.6 roller rockers, it has the intake and the head ported and polished I ported the exhaust manifold as much as we could (can't run a header
) . Any way last night was the first night out it ran hot laps just fine, then I went out for the heat race and was leading the heat and about half way thru it started missing and blowed the dip stick out of the tube. So today I pulled the head and it has burned/broke the top of the piston and the top ring on the #4 cylinder. They other three pistons appear to be ok but it looks like its running lean, the plugs were not white they was a light brownish color. So now my question how can I adjust the fuel mixture and tell if its right, I don't want to have to keeps replacing pistons trying to figure it out. Sorry if this is a repeat but i got two weeks to get it running and the fuel mixture figured out and i'm still new to workin on fuel injection stuff. Thanks
for a quick fix you could get an fmu and raise the pressure sky high to give it more fuel
I forgot to add its in a 95' sunfire dirt track car. I'm runnin a 195/60/15 on the front and at the end of the straight its turning about 5500 rpm's on a 1/2 mile slighty banked oval in 3rd gear. I was hoping for a little more rpm's but it does pull hard thru and out of the corner. Wish I had a better flowing exhaust manifold and a lightnened flywheel for it. Will it make a difference if the egr is hooked up. It is currently unhooked. Sorry if these questions are dumb or repeative questions but i'm pretty new to tuning injection stuff ( I'm used to tuning carburated big blocks HA HA!!! those are way simplier, I wish I could just run a carb on this motor). Thanks again
oh and its got a 8 gal fuel cell with 50 LB inline fuel pump
you should have at least 60 lb pump
So you think it just not getting enough fuel feed to it from the pump then to keep up on the top end cause it was never below 4000 rpm's during the heat race and it made about 4 laps before it burnt the piston. I didn't think it was lean cause the plugs were never white even after it happened but the pistons and valves appear as though it sure was lean.
ya you could be low fuel at high rpm
MadJack wrote:You need to get a '97 PCM and wiring harness (you can use the '98+PCM and harness, but you'll need to modify the wiring harness, for the relocated ICM and (if '99+) the EGR delete. You can then adjust the fuel and spark tables as needed, by anyone who has HP Tuners. You're probably mostly need the open loop tables adjusted, since most of the time you'll be running WOT.
How do you go about wiring around the cam sensor on a 95 when going to a 97 harness?
What fuel grade were you running?
fortune cookie say: better a delay than a disaster
Get a tune, or get a bigger fuel pump or bigger injectors possibly but then you will need a tune
Erik Packard
Klayton Kirkpatrick wrote:MadJack wrote:You need to get a '97 PCM and wiring harness (you can use the '98+PCM and harness, but you'll need to modify the wiring harness, for the relocated ICM and (if '99+) the EGR delete. You can then adjust the fuel and spark tables as needed, by anyone who has HP Tuners. You're probably mostly need the open loop tables adjusted, since most of the time you'll be running WOT.
How do you go about wiring around the cam sensor on a 95 when going to a 97 harness?
"95 didn't get a cam-sensor... '96 did! And since he's running a '96 block, all he'll need to do is just connect it to the "pigtail" on the later harness. That is, if the sensor is still there on the side of the block, by the oil-pressure sensor, unmolested.
Fat Rubber: So you've worked on carb'd big-blocks, eh? Must have been mind-blowing when you tore the head off the "Double-deuce" and found it was so similar in design to a oval-port BBC head, huh?
Go beyond the "bolt-on".
It was pretty cool to see how much it does resemble the v8 chevy's on the inside. Sure made me a little more at ease when we started rebuildin it, It didn't feel like we was goin at it blindly HA HA HA!!! Im thinking about maching off the throttle body and finding a bigger one off of something else and adapting it to fit, is there any major things i need to watch out for? Also do they make a plentum spacer for the top half of the intake or would it even make enough difference to worry about? As far as octane it had 91 in it that was as high as i could get where I live at with out driving quite aways. I don't have any idea what the compression ratio is it has the 98' 2200 pistons .030 over with I think .020 decked off the head. I just ordered a 85 lbs fuel pump so that should take that problem out of the equation at least now I just gotta get a new piston coming so I can get it reassembled and running again. Thanks for all the help you guys have givin keep it coming if you have anymore I need to learn all I can, LOL, without goin thru the school of hard knocks like I usually do. Kassidy
This is "almost" exactly the same set up I am running. I don't have quite that much taken off the head. I'm running a 95 computer, NO TUNE. I have been able to race 3 nights once I got my guide plates figured out. I have not had any problems, plugs look good.
Now just so you know you are running at 11.5:1+ CR so I really don't think that your 91 octane is going to cut it, maybe you had massive detonation? I run 110 sunoco and have not had any problems. I also run a fuel cell w/ a 87 Ford Ranger 2.9l rail mounted fuel pump. Hope this helps.
fat rubber i agree with rich you need high octance race gas for that setup
Yeah, it didn't sound like a "lack of fuel" problem, but a "lack of good enough fuel" problem.
I still think it's much higher than 11.5:1, especially with that much off the head.
If you're going to be tuning it anyway, maybe you could look into E85?
fortune cookie say: better a delay than a disaster
Yeah, it didn't sound like a "lack of fuel" problem, but a "lack of good enough fuel" problem.
I still think it's much higher than 11.5:1, especially with that much off the head.
If you're going to be tuning it anyway, maybe you could look into E85?
fortune cookie say: better a delay than a disaster
I thought about running e85 but I didn't know what I would need to change for it to work. Im changing to a 85lbs pump, I'm also going to put a pyrometer gauge in to make sure it's not leaning out. Do I need to or should I change to a wide band o2 sensor? Does anyone know of a different exhaust manifold that flows better and will fit, I can't run a header and I know the stock one is restricting my head a bunch. I started to grind out my stock one but theres not enough there to gain much. I got it torn apart today and theres a huge hole in the back of the piston on the intake side of the head. We also found out today that the ring gap I was told to run was not wide enough so we ordered a set Moly rings and there getting a wider gap. It ran metal thru the rod bearings to but never hurt the crank or the cylinder wall thank god so new bearings will be going in also. Im hoping to have it back together by monday just waiting on parts now. Thanks again for the great info. Kassidy
Wow... Alot to speak on here. Okay, here it goes:
To run E85 you'll need alcohol-safe fuel-lines, and a change to larger injectors. Ricozero just mentioned on another thread here how importperformance.com(<-NOT A LINK!) sold him a set of 55-pounders that he's been using. Other than that, it's just a matter of changing the values for fuel & maybe spark while the engine's in open-loop mode. That and closed-loop spark values, but I doubt you'll really need to worry about that with the static-compression you're running while on "E".
I just told Bob on another thread about how those who run in the Stock-appearing class of drag-racing would tweak their factory exhaust manifolds a bit with a Dremel, then send it to be Extrude-Honed... just to improve flow characteristics. Best thing about that method: Most techs won't be the wiser about it, since it "Appears to look
stock...."
Also: There's a thread around here about plenum-spacers... I'd search for it if I were you. It includes a link to info about the importance of tuning plenum size. I believe MadJack pointed it out, IIRC.
Go beyond the "bolt-on".
Good luck getting it running again.
We also run a 95 block. Can we run a 97 harness with the cam sensor unplugged? I was also wondering if I can run a auto ECM on a manual. It is a 97 2.2 auto ECM.
Forgive me for sounding retarded but what is CEL?
