Performed a test with the tech1... - ZR-1 Net Registry Forums

Roadster · 12-21-2016

Finally after a few years, got my tech 1 out and hooked it up to the 94. There is a learning curve for sure. So it will take some time to understand all of the capabilities that can be performed.

I have the Master Cartridge which fortunately was updated by a PO. It covers the ECM from '81 through '96. So we are covered. I also have the correct adapter needed to attach to the OBD 1 ALDL in our vehicles.

Everything started just fine, ran a cold test first, then started the engine and ran a test as the engine was warming up. Total time for the test was 18 minutes, and that was because I was writing down the info as it appeared. Went out for a ride after, but did not have the tech 1 operating without a passenger to record the parameters while in motion.

It will ask you for the 8th digit of your VIN#, which is "J" and will then ask you if a 94 Corvette. Press "YES" and you are in.....
The Menu....
F0....DATA LIST
F1....FIELD SER
F2....DTC
F3....SNAPSHOT
F4....MISC TEST

Started with F0, these results are with the engine running.....

ENG SPEED
870-890......as engine warmed up......830-815 rpm's
DESIRED IDLE
850.............as engine warmed up......812-800 rpm's

Engine coolant reading is off by 2 degrees from the IP with the tech 1 giving a higher reading by that amount.

MAP (KPa,V)
39 1.50-1.54-1.56

FUEL EVAP PURGE
0%

THROTTLE POS
0.52 VOLTS increased as throttle was depressed slightly .62 VOLTS
THROTTLE ANGLE
0%................................................ .............................2%

LEFT H025 BNK 1
53 mV
LOOP STATUS
OPEN LOOP

RIGHT H025 BNK 2
44-53 mV

ST FUEL TR BNK 1
128
LT FUEL TR BNK 1
115

FUEL TRIM CELL
16 CELL
FUEL TRIM ENABLE
NO

SPARK ADVANCE
12 degrees MPH 0 km/h 0

KNOCK RETARD
0
KNOCK SIGNAL
NO

SYSTEM VOLTAGE
14.1 VOLTS
FUEL PUMP VOLTS
13.5 VOLTS
EGR DESIRED POS
0%
EGR ACTUAL POS
0%
EGR PINTLE POS
0.60 VOLTS
EGR DUTY CYCLE
0%

IDLE AIR CONTROL
22
ENGINE SPEED
678-700 RPM's

FAN 1
OFF
FAN 2
OFF
A/C FAN REQUEST
NO
A/C REQUEST
NO
A/C CLUTCH
OFF
AIR PUMP RELAY
OFF
AIR CONTROL
DIVERT

MPH
0
Km/h
0

1-4 SHIFT ACTIVE
NO
ENG OIL TEMP
153 degrees by tech 1........149 degrees by IP
SEC VAC (kPa, V)
0 0.58

POWER SWITCH
NORMAL.....w/key turned....FULL
SECONDARY SYSTEM
OFF
FEDS/PASSKEY
OK
SEC AIR INLT SOL
OFF

CALIBRATION ID 9011

ENGINE SPEED @200degrees
691 RPM's
DESIRED IDLE
662 RPM's

After totally warmed up received these readings.....

LEFT H025 BNK1
as low as 75 mv to as high as 735 mv
LOOP STATUS
CLOSED LOOP

FUEL TRIM CELL
16 CELL
FUEL TRIM ENABLE
YES

Went into some of the other menus, but there you can make adjustments, which I wasn't about to do, no need to do so.....
Don't fully understand everything, but at least I can access all of the info at anytime.

RussMcB · 12-21-2016

Nice. Thanks for sharing.

HAWAIIZR-1 · 12-22-2016

I'm with Russ, thanks for taking time to share this.

Sent from my iPhone using ZR-1 Net Registry

Roadster · 12-22-2016

Quote:

Originally Posted by RussMcB

Nice. Thanks for sharing.

Quote:

Originally Posted by HAWAIIZR-1

I'm with Russ, thanks for taking time to share this.

Sent from my iPhone using ZR-1 Net Registry

No problem.....as mentioned, don't fully understand all of the data, but thought it may be interesting to post. I can do a snapshot I think of before, during, and after if I have an engine problem, or just check out some systems. Will have to experiment more as time goes on. I also think there is a way to check the fuel injectors along with some additional parameters. Have to check the SM to see if there is any additional info. The tech 1 manual was printed early and I don't think there were any updated versions of the manual. Been searching, but I can't find any.
I also need to have a passenger ride with me to operate and write down the info, until I figure out how to transfer the data to a printer. It will be interesting to see the data with the vehicle in motion.....
May have to recruit my wife for the job!!!

mike100 · 12-23-2016

The snapshot is useful. it can record a few seconds of data stream while you are running the car in a particular way. it records a little before and a little after you hit the stop button so you can review what was happening before the even you are interested in.

Also, if you get a freeware type of terminal emulator for you laptop or pc, you can set it up as a universal vt-100 style serial data stream and connect to the 9-pin connector on the side of the tech1. Then it will show you all the parameters at the same time on the laptop monitor without having to arrow-thru the entire screen set.

12-21-2016	#1
Roadster Join Date: Mar 2014 Location: Warrington PA Posts: 1,913	Performed a test with the tech1... Finally after a few years, got my tech 1 out and hooked it up to the 94. There is a learning curve for sure. So it will take some time to understand all of the capabilities that can be performed. I have the Master Cartridge which fortunately was updated by a PO. It covers the ECM from '81 through '96. So we are covered. I also have the correct adapter needed to attach to the OBD 1 ALDL in our vehicles. Everything started just fine, ran a cold test first, then started the engine and ran a test as the engine was warming up. Total time for the test was 18 minutes, and that was because I was writing down the info as it appeared. Went out for a ride after, but did not have the tech 1 operating without a passenger to record the parameters while in motion. It will ask you for the 8th digit of your VIN#, which is "J" and will then ask you if a 94 Corvette. Press "YES" and you are in..... The Menu.... F0....DATA LIST F1....FIELD SER F2....DTC F3....SNAPSHOT F4....MISC TEST Started with F0, these results are with the engine running..... ENG SPEED 870-890......as engine warmed up......830-815 rpm's DESIRED IDLE 850.............as engine warmed up......812-800 rpm's Engine coolant reading is off by 2 degrees from the IP with the tech 1 giving a higher reading by that amount. MAP (KPa,V) 39 1.50-1.54-1.56 FUEL EVAP PURGE 0% THROTTLE POS 0.52 VOLTS increased as throttle was depressed slightly .62 VOLTS THROTTLE ANGLE 0%................................................ .............................2% LEFT H025 BNK 1 53 mV LOOP STATUS OPEN LOOP RIGHT H025 BNK 2 44-53 mV ST FUEL TR BNK 1 128 LT FUEL TR BNK 1 115 FUEL TRIM CELL 16 CELL FUEL TRIM ENABLE NO SPARK ADVANCE 12 degrees MPH 0 km/h 0 KNOCK RETARD 0 KNOCK SIGNAL NO SYSTEM VOLTAGE 14.1 VOLTS FUEL PUMP VOLTS 13.5 VOLTS EGR DESIRED POS 0% EGR ACTUAL POS 0% EGR PINTLE POS 0.60 VOLTS EGR DUTY CYCLE 0% IDLE AIR CONTROL 22 ENGINE SPEED 678-700 RPM's FAN 1 OFF FAN 2 OFF A/C FAN REQUEST NO A/C REQUEST NO A/C CLUTCH OFF AIR PUMP RELAY OFF AIR CONTROL DIVERT MPH 0 Km/h 0 1-4 SHIFT ACTIVE NO ENG OIL TEMP 153 degrees by tech 1........149 degrees by IP SEC VAC (kPa, V) 0 0.58 POWER SWITCH NORMAL.....w/key turned....FULL SECONDARY SYSTEM OFF FEDS/PASSKEY OK SEC AIR INLT SOL OFF CALIBRATION ID 9011 ENGINE SPEED @200degrees 691 RPM's DESIRED IDLE 662 RPM's After totally warmed up received these readings..... LEFT H025 BNK1 as low as 75 mv to as high as 735 mv LOOP STATUS CLOSED LOOP FUEL TRIM CELL 16 CELL FUEL TRIM ENABLE YES Went into some of the other menus, but there you can make adjustments, which I wasn't about to do, no need to do so..... Don't fully understand everything, but at least I can access all of the info at anytime. __________________ Tom 1994 ZR-1 #009 "captured test fleet car" 1974 LS4 454 Vert 1982 L83 CFI...now a retired "dd"....Sold WAZOO Member

12-21-2016	#2
RussMcB Join Date: Jan 2015 Location: Marietta, GA USA Posts: 1,160	Re: Performed a test with the tech1... Nice. Thanks for sharing.

12-22-2016	#3
HAWAIIZR-1 Join Date: May 2010 Location: Japan Posts: 3,557	Re: Performed a test with the tech1... I'm with Russ, thanks for taking time to share this. Sent from my iPhone using ZR-1 Net Registry __________________ Craig "ZR-1 NO KA 'OI" "ZR-1 ICHIBAN" 1995 #228 Black/Black with Dunn Heads ZR-1 owner since September 2003 ZR-1 Net Registry Founding Member #0074 NCM Lifetime Member #2048

12-23-2016	#5
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,802	Re: Performed a test with the tech1... The snapshot is useful. it can record a few seconds of data stream while you are running the car in a particular way. it records a little before and a little after you hit the stop button so you can review what was happening before the even you are interested in. Also, if you get a freeware type of terminal emulator for you laptop or pc, you can set it up as a universal vt-100 style serial data stream and connect to the 9-pin connector on the side of the tech1. Then it will show you all the parameters at the same time on the laptop monitor without having to arrow-thru the entire screen set.