EXPERTEC TSB (T88-86)

Publication date: 1988-02-01
Reference number: T88-86

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

Reference Number(s): T88-86, Date of Issue: 02/01/88

STALL AFTER START, STALL - DURING DECEL, OR HES. COLD

Model(s): 1987 CIMARRONS

Date: 02/01/1988

Bulletin No.: Cadillac T88-86

Some 1987 Cimarrons may stall under one or more of the following conditions:

After start up on a cold engine
After start up on a warm engine
On deceleration

In addition, some 1987 Cimarrons equipped with manual transmissions may hesitate on acceleration cold. To repair these conditions, the following steps should be performed:

Check for vacuum leaks at the MAF sensor, PCV tube, and the EGR transfer tube.
Cplean the throttle body bore in the area behind the throttle plate to eliminate any accumulated residue. Refer to Serviceman Bulletin T-87-136, Group 6E for correct procedures.
Verify proper engine idle speed. Refer to Serviceman Bulletin T-87-136 for correct idle speed specifications.
Disconnect the negative battery cable.
NOTE: The negative battery cable must be disconnected for at least five minutes to clear the ECM memory to ensure proper idle speed.

Install revised MEM-CAL:

MEM-CAL

Emission System	Transaxle	Service Part Number	Service MEM-CAL I.D.*	Broadeast Code +
FED	(AUTO)	1228533	8533	ADRY
FED	(M/T)	16120949	0949	ADSC
CAL	(AUTO)	1228534	8534	ADRZ
CAL	(M/T)	16120953	0953	ADSD
- ECM MEM-CAL I.D. can be read with a scan tool connected to the ALDL link. + - Broadcast Code can be seen through the access hoIe on the top side of the MEN-CAL cover.

Reconnect the negative battery cable.
Start and idle vehicle in park (or neutral for manual transmission) for five minutes.
Turn air conditioning off and ensure the coolant temperature is between 800 C and 1070 C.
Block the wheels, apply the brake, and idle the vehicle in drive for one minute (for manual transmissions, leave the vehicle in neutral).
If a stall or hesitation condition still persists, refer to:

- Bulletin 88-74, Group 6D "Misdiagnosis of the Direct Ignition System (DIS)".

- Bulletin 88-9,Group 6D, "Engine Miss, Backfire, Hard Start, Hesitation, or Stall".

- Section 6E3-B of the Service Information Manual.

For warranty purposes, use Labor Operation T6280 at 1.2 hours.