P0102, P0341 and intermittent Throttle Pos Sensor??

Mr.Riviera wrote:

you are "supposed" to do a CASE learn whenever you replace the pcm or remove the crank sensor. most people dont get it done unless they get a code for it, or they have problems.

This is correct AFAIK.

Albertj

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1998 with all fac. opts. (exc. CD changer and subwoofer); 209,000 miles. Mods: KYB front struts, extra noise barriers, fire extinguisher, Magnecor 8mm plug wires, 4-note horn, custom-made stainless exhaust.

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With a scan tool, the CASE learn procedure takes a minute or two.

I did not find a manual procedure for CASE learn in the repair manual; it may be in the second edition of the '98 manual (I now have first edition).

I did find the procedure, which basically is to clear all the DTCs then with engine temperature at least 158F (70C) you:

- turn ignition off
- use scan tool to get into CASE Learn mode
- start the Riv in PARK
- step on the brake
- press on accelerator until fuel cutoff is reached (that's 5150 RPM) and when you hit that fuel cutoff, get off the gas immediately
- if the procedure terminates abnormally (the scan tool will indicate) then clear codes, turn car off and try again.
- check status of DTC P1336, if it ran and passed then pat yourself on the back because you are done. If not then repeat as necessary.

By the way if you do replace your production PCM with a service PCM be sure to copy the broadcast code and production PCM number to a (big) sticker on the service PCM.

Albertj

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1998 with all fac. opts. (exc. CD changer and subwoofer); 209,000 miles. Mods: KYB front struts, extra noise barriers, fire extinguisher, Magnecor 8mm plug wires, 4-note horn, custom-made stainless exhaust.

Avatar is missing.

Got it. It was a broken wire. Well, 2 wires. Thanks to all who helped me!!

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1996 Riviera. Pretty much stock for now. Just replaced the S/C with one from a 99, oil pump, water pump, lower intake gasket set, re-ground the crank with new bearings, power steering pump and the list goes on.

96Super wrote:

Got it. It was a broken wire. Well, 2 wires. Thanks to all who helped me!!

Glad you found the problem!
Which wires were broken, wherebouts were they broken and how were they repaired? study

Bert

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99 Riviera(on the left)
"Cruising Missile"
Midnight Blue Pearl
90,000 miles
GuttedAirBox

70GS455(on the right)
Diplomat Blue
"Howitzer with windshield wipers"

ibmoses wrote:

96Super wrote:

Got it. It was a broken wire. Well, 2 wires. Thanks to all who helped me!!

Glad you found the problem!
Which wires were broken, wherebouts were they broken and how were they repaired? study

Bert

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'98 Buick Riviera; Gen V 3.25 pulley, N*, VS Cam, 180 stat, Custom PCM (Powrtuner), headers & HF cat , 42.5 lb inj.

Grant-built/PRJ/Thrasher trans 3.29 gears, 7/8 chain, zzp hardened IS

ibmoses wrote:

96Super wrote:

Got it. It was a broken wire. Well, 2 wires. Thanks to all who helped me!!

Glad you found the problem!
Which wires were broken, wherebouts were they broken and how were they repaired? study

Bert

I have no clue how they broke.... there is 2 large connectors on the firewall, the 2 wires were broken behind the block, the one next to the cruise control motor. They were broken so shot, and clean it almost looks like it was cut with wire cutters... So I butt-connected the two together, and now it runs strong!! YAHOOO

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1996 Riviera. Pretty much stock for now. Just replaced the S/C with one from a 99, oil pump, water pump, lower intake gasket set, re-ground the crank with new bearings, power steering pump and the list goes on.