A few years ago I completed the 3.4 DOHC engine swap in my 1988 Fiero GT. The car ran fine for 1400 miles and now I am having some running problems with it. I am wanting to know if anyone out there knows of a GM OBD 1 Diagnostic tool that I can plug into the diagnostic port and have the car running and see what the fuel injectors are doing, what kind of fuel pressure the engine is getting and what the other sensors in the car are doing? I have seen some on Ebay, but not sure if they are what I need or not. I do not want a code reader, I really would like a diagnostic tool that tells me what is going on in real time as the car is running. Any help or suggestions would be greatly appreciated.

quote Originally posted by Fierogtfan88: A few years ago I completed the 3.4 DOHC engine swap in my 1988 Fiero GT. The car ran fine for 1400 miles and now I am having some running problems with it. I am wanting to know if anyone out there knows of a GM OBD 1 Diagnostic tool that I can plug into the diagnostic port and have the car running and see what the fuel injectors are doing, what kind of fuel pressure the engine is getting and what the other sensors in the car are doing? I have seen some on Ebay, but not sure if they are what I need or not. I do not want a code reader, I really would like a diagnostic tool that tells me what is going on in real time as the car is running. Any help or suggestions would be greatly appreciated.

https://www.ebay.com/itm/OT...0:g:Lb0AAOSwvfZZ5V30

You will have to purchase a feul pressure gauge for injector/pressure testing. You can see the miliseconds of pulse width but that really doesn't help much.

[This message has been edited by GTaylor (edited 12-21-2017).]

try aldldroid.com
You'll need to buy a Bluetooth connector or usb connector for the 12 pin but the app is only $18.00 and then you can read from your phone or tablet.
I have not used it yet but planning on the purchase.

quote Originally posted by GTaylor: https://www.ebay.com/itm/Sn...9:g:lQ8AAOSwa81aLEBi

X2, love my red brick. Used mine to monitor TPS voltage once when I was getting an intermittent code, figured out the wiring was bad when the readings would go open circuit as I moved that portion of the harness. OBD 0/I tools are dirt cheap now.

OBD1 Scanners won't track fuel/oil/coolant pressure.
Most times won't see intermittent problems because slow data that only updates 1-2 x per sec.

Yes, Can work if you wiggle/pull a wire to cause the problem longer then a few seconds. If you have these most times looking can tell or check output for most sensors using a volt meter. Volt meters will display in real time and way faster using a scanner. Back prob connection or pierce wire w/ a needle. If you pierce then water proof the small hole just wipe silicon or brake grease.

Yes, If Data stream for any ECM/PCM says sensor is "bad" first check grounds and other things highlight in vid above. To Many morons, code = bad whatever and replace and does nothing but still you pay for the part. That's Including Shops only hire ASE mechanics and Dealer shops w/ "factory certified" people.

See my Cave, Scan Tool Help and most of rest of section.

quote Originally posted by GTaylor: I paid $1800.00 for the above back-in-the-day. Professional tool not cheap parts store junk. I am unaware of any OBD-I aftermarket scan tools. The OTC is very easy to use. Plus it does Ford/Dodge/GM and Asian vehicles if you find the update. I actually have the Asian cables i forgot to send with my old scanner when i sold it..

don't bother to check?
Currently have several types on the market and most are cheap. example http://www.reddevilriver.com/aldl.html and have Bluetooth version too.
Even in 80's-90's AutoXray and a few others had them and cheaper then that and available thru many parts stores.
I have AutoXray GM only scanner for close to 20 years and cost under $200. Got mine on sale at pepboys < $150.
AutoXray 2500 reads obd 1 and 2 for $222 at Actron div of Bosch Auto.

------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave

There is also Tunerpro RT. Needs an aldl cable, runs on a windows laptop. It's a free download, and a donation if you like it. Also useful if you decide to modify your program.

------------------
SCREW PHOTOBUCKET. All my pictures are now available at https://www.flickr.com/photos/156871275@N07/albums
'87 GT , '00 3800 Series II SC, 4t65e, Vue Power Steering.

quote Originally posted by theogre: OBD1 Scanners won't track fuel/oil/coolant pressure. Most times won't see intermittent problems because slow data that only updates 1-2 x per sec. Yes, Can work if you wiggle/pull a wire to cause the problem longer then a few seconds. If you have these most times looking can tell or check output for most sensors using a volt meter. Volt meters will display in real time and way faster using a scanner. Back prob connection or pierce wire w/ a needle. If you pierce then water proof the small hole just wipe silicon or brake grease. Yes, If Data stream for any ECM/PCM says sensor is "bad" first check grounds and other things highlight in vid above. To Many morons, code = bad whatever and replace and does nothing but still you pay for the part. That's Including Shops only hire ASE mechanics and Dealer shops w/ "factory certified" people. See my Cave, Scan Tool Help and most of rest of section. [QUOTE]Originally posted by GTaylor: I paid $1800.00 for the above back-in-the-day. Professional tool not cheap parts store junk. I am unaware of any OBD-I aftermarket scan tools. The OTC is very easy to use. Plus it does Ford/Dodge/GM and Asian vehicles if you find the update. I actually have the Asian cables i forgot to send with my old scanner when i sold it..

don't bother to check?
Currently have several types on the market and most are cheap. example http://www.reddevilriver.com/aldl.html and have Bluetooth version too.
Even in 80's-90's AutoXray and a few others had them and cheaper then that and available thru many parts stores.
I have AutoXray GM only scanner for close to 20 years and cost under $200. Got mine on sale at pepboys < $150.
AutoXray 2500 reads obd 1 and 2 for $222 at Actron div of Bosch Auto.

[/QUOTE]

You mad bro? You seem offended by my post. I've never used any of the cheap, Chinese, reverse-engineered scan tools. Only professional quality tools. IDS/Tech 2/Snap On/OTC. I fixed plenty of cars with the slow OTC I linked above. I am NOT familiar with the 3.4 DOHC GM engine. Was it available in an OBD-II configuration? That would be nice although require running a twisted pair for communication and appropriate PCM.