EXPERTEC TSB (T84-7)

Publication date: 1983-09-15
Reference number: T84-7

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

Reference Number(s): T84-7, Date of Issue: 09/15/83

HARD START, ROUGH IDLE,CODE 33 - EGR BIND IN WIDE OPEN

Model(s): 1983 Cimarron

Bulletin No.: Cadillac T84-7

Date: 09/15/1983

BULLETIN ILLUSTRATION LIST

Fig 1: Graphic

SERVICE INFORMATION

Comments of hard starting, rough idle, black smoke and/or intermittent check engine light (code 33) on 1983 Cimarrons (with vacuum pumps), built before B.P. 418443, may be caused by the EGR valve sticking in a wide open position after engine shutdown. All Cimarrons built before B.P. 410423 were equipped with vacuum pumps. Following B.P. 410423, only cars with Cruise Control were equipped with vacuum pumps.

This condition can be eliminated by installing an EGR valve vacuum bleed connector (P/N 14079541) in the EGR signal vacuum line at the EGR valve (see Fig 1 ). This bleed will allow trapped vacuum to dissipate after engine shutdown and the EGR valve to return to a closed position. Proper EGR operation can be determined by the diagnostic chart.