96 SAAB 900 SE Turbo

PORTEOUS

MEMBER
1996 SAAB 900
4 CYL
2WD
MANUAL
172,000 MILES

96 Saab 900 SE Turbo:Car was scanned and code 1170 came up. Car has rough idle and getting worse. The Auto Repair Shop really couldn't pinpoint the probelm. It has new DI Cassette, spark plugs, throttle body cleaned, value cover gasket. Could this be O2 sensors or coolant sensor causing this?

6 Replies

DOCFIXIT

MECHANIC
18,828 POSTS

Fault in variable intake manifold circuit is open

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Tuesday, June 28th, 2011 AT 4:21 PM

PORTEOUS

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4 POSTS

Is this on the manifold itself?

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Tuesday, June 28th, 2011 AT 4:49 PM

DOCFIXIT

MECHANIC
18,828 POSTS

Yes motor operates butterflys to change intake from log runner to shorter run

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Tuesday, June 28th, 2011 AT 6:01 PM

MNTHNY4

MECHANIC
612 POSTS

Did u check for any vacuum leaks in intake system, exhaust system before o2s sensor, also check your fuel pressure & your evap system purge valve function. Good luck.

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Thursday, June 30th, 2011 AT 2:51 PM

DEREKOLIVEIRA

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23 POSTS

To see if is the lambda you have to go and turn on the ISAT for reading values?And you can spray quick start taking a vacum hose with engine idle, if the value of lambda QUICKLY rise to a rich mixture so the sensor is fine!In my opinion is a intake leak