Guys, just as the subject says. Could i send somebody my dbf file i took and possibly get some suggestions? I don't have a clue as to where to start.


Brendan

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1987 IROC-Z L98,SuperRam,EB 6085's,LPE 219/219 Roller, Crane 1.6RR, EB TPI Base, 58mm TB, ADS 24#, AFPR, K&N, EB TES, Catco Cat, 3" Borla Cat-Back, Accel cap,rotor,distro/other crap, MSD 6AL, MSD Blaster 3, Aluminum DS, 94 Disk Rear, Adjustable Valve, Precision 3.73 Gears, Sub-Frame Connectors, Hotchkis Lower Control Arms, KYB Shocks/Struts, Suspension Techniques Lowering Springs, Polyurethan Bushings all over the place, Moog Upper/Lower Ball joints and Tie Rods ends/Idler Arm,

To see the ROC, Check out the webpage Here

 

Oh , to add some more input. The car seems to like gas. I don't know if i'm just heavy footed or whats going on. The code 33 keeps coming up intermittenly also.

 

Lierch,

I'd like to check out the .GDF file you have (the Diacom file, not the converted file).

I just recorded a couple minutes worth of info on my car, and I'd like to compare parameters. It would be nice to see how ECM's compare, and if there are any major differences.

I'm still new to analyzing the numbers, so I wouldn't be able to give any pointers just yet.

Thanks,

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86 Trans Am WS6 Black with tinted windows, shaved door handles
ZZ4, Mini-ram, true duals, LT4 HotCam, AFR 195 heads.
***Too many other mods to mention***

"In the future, cities will become deserts,
roads will become battlefields, and the hope of mankind
will appear as a stranger" The Road Warrior

 

Leirch,

Email it to me (click on "click here to email TunedPort350" directly above... I'll be happy to take a look at it for you.

 

Steve, Tunedport350
I have sent you both the dbf file(the compressed one). Thanks alot. Any ideas/help is appriciated.

Thanks,

Brendan

 

leirch,

You should try your car on one of my chips.
We have similar setups.

I just installed 24# SVO injectors (26#/hr on the GM system) and am still trying to dial in the correct fuel mixture. Maybe we could get together some weekend?

Besides I would like to see your readings, but I dont have diacom.

Doc



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'87 L98 TPI IROCZ, AFR190 heads, 3.70 gears, ZZ9 cam, 2400 Art Carr TC, SLP 1 3/4" headers, SLP cat-back, no cat, no AC, no MAF screens, Accel manifold base & SuperRam, 24#/hr SVO injectors, Edelbrock double roller timing chain, MSD ext coil & distributor, trans cooler, 52mm TB with airfoil, TB coolant bypass, AFPR(58psi), K&N filters, Hotchkis lowering springs, my custom chip, Lay Ind. ram air kit, SS Brakes 1LE upgrade 12" rotors dual piston calipers, 265/45R16 Kumho V700 tires.
ET 13.39sec @ 107.21mph
'90 Eagle Talon AWD, no rust thru 9 winters
'99 Camaro SS, red, 6-spd, T-tops, Mcleod clutch, Pro 5.0 shifter, MAF processor, Direct Flow airlid, K&N filter, next mod: 4.10 rear gears
313.7Hp & 320.6ft-lbf, ET 13.55sec @ 105.1mph

 

Just looked at it for a few minutes...

Like you said, there is something not right with yout TPS. Did you try adjusting it to .57 volts yet?....seems slightly low at idle. As far as it only going up to a total of 2.25 volts, you should shoot for at least 4.50 volts at full throttle. I noticed that your data stream doesn't include a TPS% like mine does, and that right there would tell you whether or not it's sending a full-throttle message to the ECM if you had the TPS% parameter. Try adjusting it and then do a few full throttle blasts while your driving to see if it registers upwards of 4 volts. If it doesn't, then it might be time for a new TPS. I wonder if that has anything to do with your code 33....Possibly.

Your IAC seems to be registering less than 25 steps at idle, which is good. Just remember every time you adjust the IAC, you must then reset the TPS.


I noticed that at 55mph (frame 4464), your idle dropped off to zero....what happened there? Looks like it died rather than the ignition being turned off....IAC steps pegged out at 160, and all other readings stayed active which is what happens when the engine dies, and the ignition power remains on. This Diacom stuff is COOL!

I'm going to take another look at things. Were both learning here.

Anyone else have any ideas?


------------------
86 Trans Am WS6 Black with tinted windows, shaved door handles
ZZ4, Mini-ram, true duals, LT4 HotCam, AFR 195 heads.
***Too many other mods to mention***

"In the future, cities will become deserts,
roads will become battlefields, and the hope of mankind
will appear as a stranger" The Road Warrior

[This message has been edited by Steves ZZ5 (edited April 12, 2001).]

 

Steve,
The frame you noticed where it died off was when i was coming to the exit ramp to get off interstate. I put the clutch in and the engine just died for no reason? Its like its getting shocked from a certain rpm directly down to idle. It does that sometimes, any ideas?
And i have done the TPS test. it works fine when i manually test it. I am going to look into that problems some more when i get some time to take some more runs.

 

Leirch,

I also took a quick look at it and saw pretty much what you did, the TPS never goes above 2.25 volts , this is also causing the A/F ratio commanded to never change from 14.7:1 (shown in graph) which is also not good. As far as the code 33 (mass airflow sensor high) you can see (shown in graph) that the sensor reading is maxed out to 255, which is setting this code. Can't help you much there, if the sensor is working correctly than you are outflowing it.





Even with all of these issues your knock count is low and the O2 sensor readings look good.

Your programmed spark seems real high though. I am assuming that it is not really 48deg while cruising at 2400r's, or that your base timing is set lower to compensate?



Do you ever hear any pinging? Did you ever test the knock sensor? Where did you get the prom from?

[This message has been edited by TunedPort350 (edited April 12, 2001).]

 

I don't hear any pinging. The prom is made up of the ARAP and APYP(89vette 6speed). I have the ARAP with 24lb injector, i have the egr disabled. I also adjusted the desired idle speed up to 775 in the lowest area. The prom that is in it is basically an ARAP with the APYP main spark table(mainly for the aluminum heads).

 

Oh and i never tested the knock sensor.

 

Well, it's good that your not pinging because that seemed like an awful lot of total timing. But you definately have to get that TPS issue resolved... I'll look at it again in more detail to see if there is anything I missed. I'll also send you one of mine so that you can compare, I figure it's always good to have some reference.