Checking codes.

[Tha Driver]

How do you check the codes? The lousy haynes manual doesn't even list it (I hate haynes manuals), & I can't find it using a search here - & got wrong info when I did so at pff.
The Indy has running problems.
Thanks,
~ Paul
aka "Tha Driver"

Custom Fiberglass Parts

[TopNotch]

Did you check this page?
Note: Your ALDL connector will probably be upside down compared to the picture.
Short A and B terminals. Turn key to ON but not Start. Watch for blinking of Check Engine light.
It should blink 12 (once and then twice) followed by a delay and repeat three times. Then it will blink error codes in the same fashion.

[Tha Driver]

Did you check this page?
Note: Your ALDL connector will probably be upside down compared to the picture.
Short A and B terminals. Turn key to ON but not Start. Watch for blinking of Check Engine light.
It should blink 12 (once and then twice) followed by a delay and repeat three times. Then it will blink error codes in the same fashion.

Thanks for that.
I hate computer controlled cars. I got code 34 & code 44. I swapped out the MAP with a used one but I think it's from a V6 - it was screwed to some hard lines. Still doing the same thing: will start & idle but RPMs go up & down. When you give it gas it dies. It's getting gas & has a new made in U.S.A. ($30!) fuel filter.
Did I mention I hate computer controlled cars?
~ Paul
aka "Tha Driver"

Custom Fiberglass Parts

[Roger]

MAP/pressure sensors
There are several varieties of pressure sensors from GM: Map sensors in 3 varieties (1 bar, 2 bar, 3 bar), and a barometric pressure sensor.
1 Bar sensors are good for NA engines, they measure from 0 (vacuum) to approximately atmospheric pressure,
2 Bar sensors ares good for 15 PSI of boost (turbo),
and a 3 Bar unit is good for 30 psi of boost (supercharged).
They all share a common pinout, although the connector keying may be different:

[Tha Driver]

MAP/pressure sensors
There are several varieties of pressure sensors from GM: Map sensors in 3 varieties (1 bar, 2 bar, 3 bar), and a barometric pressure sensor.
1 Bar sensors are good for NA engines, they measure from 0 (vacuum) to approximately atmospheric pressure,
2 Bar sensors ares good for 15 PSI of boost (turbo),
and a 3 Bar unit is good for 30 psi of boost (supercharged).
They all share a common pinout, although the connector keying may be different:

[TopNotch]

Have you checked the fuel pressure?

[Tha Driver]

Have you checked the fuel pressure?

I don't see a fitting to hook up the gauge; how do I do that?
Thanks,
~ Paul
aka "Tha Driver"

Custom Fiberglass Parts

[TopNotch]

You have to put on some kind of adapter. See one kind here.
An 84-86 car will be different, but the same idea.

[Tha Driver]

You have to put on some kind of adapter. See one kind here.
An 84-86 car will be different, but the same idea.

Yeah... I don't have one of those & no money to buy one.
Did I mention I hate computer controlled cars?
~ Paul
aka "Tha Driver"

Custom Fiberglass Parts

[Tha Driver]

Well now I have the money to buy one ("T" fitting to test fuel pressure) & Actron says it's out of stock & no one else can get one (or even look it up on their computer in some cases) so I guess I'm SOL.
Anyone have one they want to sell? I'm tired of the Indy just sitting for months 'cause of a stupid little (I hope) malfunction! 
~ Paul
aka "Tha Driver"

Custom Fiberglass Parts

[TopNotch]

You can check the unregulated pressure of your fuel pump by disconnecting the supply fuel line at the throttle body and connecting it to a gauge. Then apply 12v to the ALDL G connector to run the pump. You may have to jury rig the gauge connection, but I think you can do that.
If you can order from Amazon, you can get this.

[Tha Driver]

Thanks for that but I don't have the money for the whole kit. I *can* get an inline T that replaces the fuel filter, but I don't want to run the car without it. But thinking about it yesterday I can probably get a fitting & use the T inline with the filter...
Thanks again,
~ Paul
aka "Tha Driver"

Custom Fiberglass Parts

[Tha Driver]

Well I went back to get the T that replaces the filter, & they wanted over SIXTY BUCKS for it!!! Needless to say I didn't buy it. I still need a T if anyone has one they want to sell. REALLY tired of the Indy sitting - especially for what SHOULD be a simple fix... 
Thanks,
~ Paul
aka "Tha Driver"

Custom Fiberglass Parts

[Tha Driver]

OK got the kit mentioned in the other thread ( http://gafieroclub.org/bbs/index.php?topic=1083.0 ) & my Indy showed ZERO fuel pressure! Pulled the tank & it's clean & the sending unit & fuel pump look brand new.  However, the hose on the pump was very soft & swollen. I have the info from the thread on which hose to use so I'll get that & see what happens.
But I have another question: The vent line seems to be blocked. At least I can't blow or suck any air through it.  Wonder if that has anything to do with the problem? Before I pulled the tank I did try running with the gas cap off & it didn't make any difference.
Thanks,
~ Paul
aka "Tha Driver"

Custom Fiberglass Parts

[Fierofool]

I'm guessing the hose you're talking about is the one Don mentioned that you can get at NAPA that is submersible in ethanol.  There's one that's ethanol resistant, but that's just for the inside of the hose.

A couple of years ago Don was having problems with his 86 shutting down and after it would sit for about 5 minutes he could start it and continue on down the road.  Never any pattern to it quitting.  He thought that it might be the gas cap and replaced it but it didn't help, so his suspicions were then that it was the fuel pump overheating and shutting down.  He eventually found that it was the Evap Canister.  He totally disconnected it from the tank and he said he was glad that he did.  When he blew it out there was all kinds of junk came out of the line that would have gone into the tank.  While you have your tank out, you might want to check out the canister and also remove and clean the foam rubber filter underneath the bottom of it.