Unknown pcm identification

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95GTSpeedDemon
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Unknown pcm identification

Post by 95GTSpeedDemon » Sat Apr 13, 2019 6:14 pm

So, i have a car im working on that has me a little stumped.
Foxbody with a cbaza pcm.
Customer is not a gearhead.
Old tuner couldn't fix the hit idle surge. He is the one that did the swap. Customer stated the old tuner mentioned only needing to swap a couple injector wires. I see a plain butt connector at the pcm connector. Yay 😆

Down to the issue. It has a chip that allows it to run. Im waiting on the F3 to arrive so i can read it. In the meantime i hooked up the QH and loaded a tune for the pcm swap (decipha says changing injector firing order and outout ports is pretty much all is needed).
Cbaza Loaded tune wont fire up. Clear flood mode gets it to fire off some, but it wont stay running at all.
Pcm is some reman, bluestreak brand. The board has ford # etched, but it looks stripped down.
So i try to read the ford calibration with the QH and it wont read properly; kam error and mostly zeros.
Thoughts?

Oem calibration sticker has been stripped. Gufb doesnt read correctly either. QH worked fine on the last car.

95GTSpeedDemon
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Re: Unknown pcm identification

Post by 95GTSpeedDemon » Sat Apr 13, 2019 6:23 pm

pcm1.jpg
pcm1.jpg (199.38 KiB) Viewed 822 times
pcm 2.jpg
pcm 2.jpg (259.88 KiB) Viewed 822 times

jsa
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Re: Unknown pcm identification

Post by jsa » Sun Apr 14, 2019 1:31 am

A quick google of the hardware code smd-333 shows the hardware was common to ranger, explorer and mustang.

Doesn't give a clue to firmware that is on the chip.

All the clear coat cleaned off the J3 to get a good QH connection?
Cheers

John

95 Escort RS Cosworth - GHAJ0 / ANTI on a COSY box code
Moates QH & BE
ForDiag

95GTSpeedDemon
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Re: Unknown pcm identification

Post by 95GTSpeedDemon » Sun Apr 14, 2019 4:25 am

Very clean

ironmanisanemic
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Re: Unknown pcm identification

Post by ironmanisanemic » Sun Apr 14, 2019 9:31 am

pull a read of the ECU and post the binary here. Someone here can do a compare and try to identify what it is.
1989 Ford Bronco:
-393W, Edelbrock Performer RPM heads, ProComp Upper and lower intake, Custom Comp Hyd Roller cam, 10:1 compression, 30lb injectors, 75mm TB, Pro-M 80mm MAF, equal length short tube headers, 2.5 inch y pipe merged into single 3 inch with hooker aerochamber muffler and no cat, QH w/ BE and EA running U4P0, AOD

1995 Ford Mustang GT
-Bone stock minus the QH. 5 Speed. T4M0

sailorbob
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Re: Unknown pcm identification

Post by sailorbob » Sun Apr 14, 2019 1:06 pm

SMD-333 is used on the '94-'95 5.0 L manual transmission Mustangs.

95GTSpeedDemon
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Re: Unknown pcm identification

Post by 95GTSpeedDemon » Sun Apr 14, 2019 1:13 pm

Well, i wonder why it didnt want to run.
I ran it with no chip and it still ran better than what i loaded.
I guess the pro m curve i used wasnt right.
I loaded the ford 24lb data, which the maf is matched for.

Since i haven't used a matched maf, should i leave injector and maf data stock?

95GTSpeedDemon
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Re: Unknown pcm identification

Post by 95GTSpeedDemon » Sun Apr 14, 2019 8:58 pm

Update:
I got it idling on CBAZA. its finicky as hell.
it seems i got bank 1 issue possibly, it reads dead lean at idle while bank 2 switches around stoich. give it some/enough throttle and bank 1 responds.
so, i turned on open loop, set both fuel tables to stoich and set startup fuel to zero. customer has a 160* t-stat with aftermarket fan controller, so i kinda have to work around that for now.
anyway, its commanding like 10.8 lambse with 1.0 kam, idles great, bank 2 is switching at stoich, bank 1 dead lean.
i cant make lambse target stoich, which is weird.

i may end up having pin fit problems, the guy who moved the wires for the cbaza swap made a couple pins loose, #7 injector being one of them.

ideas on lambse not targeting what the tables are set to?

ironmanisanemic
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Re: Unknown pcm identification

Post by ironmanisanemic » Sun Apr 14, 2019 9:05 pm

95GTSpeedDemon wrote:
Sun Apr 14, 2019 8:58 pm
Update:
I got it idling on CBAZA. its finicky as hell.
it seems i got bank 1 issue possibly, it reads dead lean at idle while bank 2 switches around stoich. give it some/enough throttle and bank 1 responds.
so, i turned on open loop, set both fuel tables to stoich and set startup fuel to zero. customer has a 160* t-stat with aftermarket fan controller, so i kinda have to work around that for now.
anyway, its commanding like 10.8 lambse with 1.0 kam, idles great, bank 2 is switching at stoich, bank 1 dead lean.
i cant make lambse target stoich, which is weird.

i may end up having pin fit problems, the guy who moved the wires for the cbaza swap made a couple pins loose, #7 injector being one of them.

ideas on lambse not targeting what the tables are set to?
Either Fueling needs to be dialed in or you have a wiring/sensor problem. If it's only one bank that is out and only at idle, I would suspect the o2 sensor itself first then if that's not it start looking at injectors not firing on that bank.
1989 Ford Bronco:
-393W, Edelbrock Performer RPM heads, ProComp Upper and lower intake, Custom Comp Hyd Roller cam, 10:1 compression, 30lb injectors, 75mm TB, Pro-M 80mm MAF, equal length short tube headers, 2.5 inch y pipe merged into single 3 inch with hooker aerochamber muffler and no cat, QH w/ BE and EA running U4P0, AOD

1995 Ford Mustang GT
-Bone stock minus the QH. 5 Speed. T4M0

95GTSpeedDemon
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Re: Unknown pcm identification

Post by 95GTSpeedDemon » Sun Apr 14, 2019 10:15 pm

take a gander. few second log of where i left off at.
Attachments
Clayton T4M0 idle only 2019_Apr_14_19-20-55.csv
(250.09 KiB) Downloaded 7 times
Clayton T4M0 idle only.BIN
(56 KiB) Downloaded 7 times

95GTSpeedDemon
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Re: Unknown pcm identification

Post by 95GTSpeedDemon » Sun Apr 14, 2019 10:24 pm

Fuel - Open Loop Multiplier vs ACT may have been the issue, since its stock values reduce the AFR by like 30%

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cgrey8
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Re: Unknown pcm identification

Post by cgrey8 » Mon Apr 15, 2019 5:21 am

The fact that Bank 1's HEGO will respond is an indication it isn't a sensor or wiring problem, but some other issue. My guess is you have an exhaust leak or some other problem that's getting O2 into the exhaust on that bank throwing the Bank 1 HEGO's measurements. But that's just a guess. I can't remember if EGR pulls from the Bank 1 or Bank2 exhaust. But if it is Bank1, check the EGR valve/blockoff seal to make sure it's not where the leak is. If the exhaust system itself is an aftermarket that was fitted together, not welded, check the connections for leaks.

The other option is you just connect the Bank 2 HEGO to the Bank 1 input and setup the tune for single-bank operation.
...Always Somethin'

89 Ranger Supercab, 331 w/GT40p heads, ported Explorer lower, Crane Powermax 2020 cam, 1.6RRs, FMS Explorer (GT40p) headers, Slot Style MAF, aftermarket T5 'Z-Spec', 8.8" rear w/3.27s, Powertrax Locker, Innovate LC-1, GUFB, Moates QuarterHorse tuned using BE&EA

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sailorbob
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Re: Unknown pcm identification

Post by sailorbob » Mon Apr 15, 2019 8:00 am

What is the engine? I am curious why the injector firing order has been changed.

95GTSpeedDemon
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Re: Unknown pcm identification

Post by 95GTSpeedDemon » Mon Apr 15, 2019 8:06 am

Fox harness with a (i think) a T4MO. From what i saw, old tuner moved the 3 wires necessary at the pcm for that swap, which requires the fire order change in the tune; as per decphia's direction.
"MINIMUM REQUIRED to be moved to successfully operate an SN95 (94-95 5.0L V8) CBAZA Strategy ecu using a stock 89-93 foxbody harness.
This will allow you to run the T4M0, U4P0, S4M1, J4J1, W4H0, ZA0, and FCLO ecu's instead of using the A9L, A3M, A9M, X3Z, D3D, AP9, or A9T ecu's.
Note: If you would like to be able to interchange between a GUFB and CBAZA ecu, pins can be added and the wires tapped to existing wires in lieu of moving pins.

move pin 52(inj-8) to pin 39 (empty slot)
move pin 42(inj-7) to pin 35(empty slot)
move pin 29(hego-1) to pin 44(empty slot)

If using the high speed fan output on a foxbody ecu move pin 41 to 32
OPTIONAL
tap Pin# 46 to ground do not remove or cut it this is signal return (ground), most fox harnesses have grounding issues, tapping 46 to ground will resolve most ground issues."
Highly recommended but not necessary.
There is a catch though, in order to do so without having to swap more pins around a tune is required, not really a tune just a few values need to be changed.

You must:
DISABLE: ccd (optinal), fpm, am1, am2, canp, octane, smog, and thermactor (smog pump)
change firing order to 1-6-4-2-5-8-7-3
change injector ouput ports to: 00222002

If your wondering as to why change the firing order to the above which appears wrong, its because we didn't move all the injector wires but only the two we needed.
so for reference this is what we now have

Code: Select all

Pin#	Inj#	ECU Output#	Firing Order	Bank
58	1 		1	1st		Passenger
59	2		2	4th		Passenger
12	3		6	2nd		Passenger
13	4		7	7th		Passenger
14	5		8	6th		Driver
15	6		5	5th		Driver
35	7		4	3rd		Driver
39	8		3	8th		Driver
________________________________
Edited by cgrey to make the Injector table fixed-width format
in order to display in a browser correctly.

As you can infer, the Injector Output Port will need to be updated as well to identify which hego controls which injector.

sailorbob
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Re: Unknown pcm identification

Post by sailorbob » Mon Apr 15, 2019 8:22 am

For the sake of moving four more injector wires I think that is preferable to playing around with the injector firing order and injector output port.

95GTSpeedDemon
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Re: Unknown pcm identification

Post by 95GTSpeedDemon » Mon Apr 15, 2019 8:30 am

sailorbob wrote:
Mon Apr 15, 2019 8:22 am
For the sake of moving four more injector wires I think that is preferable to playing around with the injector firing order and injector output port.
10-4
I found a few pins not staying in place, which could make this a fun time getting tuned correctly.

ironmanisanemic
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Re: Unknown pcm identification

Post by ironmanisanemic » Mon Apr 15, 2019 8:48 am

cgrey8 wrote:
Mon Apr 15, 2019 5:21 am
The fact that Bank 1's HEGO will respond is an indication it isn't a sensor or wiring problem, but some other issue. My guess is you have an exhaust leak or some other problem that's getting O2 into the exhaust on that bank throwing the Bank 1 HEGO's measurements. But that's just a guess. I can't remember if EGR pulls from the Bank 1 or Bank2 exhaust. But if it is Bank1, check the EGR valve/blockoff seal to make sure it's not where the leak is. If the exhaust system itself is an aftermarket that was fitted together, not welded, check the connections for leaks.

The other option is you just connect the Bank 2 HEGO to the Bank 1 input and setup the tune for single-bank operation.
It is possible that the heater has failed in the hego, giving the indicated symptoms. At idle, if the sensor heater has failed, it won't keep enough heat to read. But off idle, the engine will produce enough heat to cause the sensor to read properly again. I am begining to lean to the repinning of the eec connector causing his problems.
1989 Ford Bronco:
-393W, Edelbrock Performer RPM heads, ProComp Upper and lower intake, Custom Comp Hyd Roller cam, 10:1 compression, 30lb injectors, 75mm TB, Pro-M 80mm MAF, equal length short tube headers, 2.5 inch y pipe merged into single 3 inch with hooker aerochamber muffler and no cat, QH w/ BE and EA running U4P0, AOD

1995 Ford Mustang GT
-Bone stock minus the QH. 5 Speed. T4M0

95GTSpeedDemon
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Posts: 54
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Re: Unknown pcm identification

Post by 95GTSpeedDemon » Mon Apr 15, 2019 8:54 am

I may swap 02 sensors and see if it swaps banks. Most logical test i can think of.

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