Diagnosing a 1g w/codes

People that help us by sharing their knowledge, and post threads that GIVE more than they EXPECT may see their threads stickied for a week or so. -JoeWagon

You can find alot of "what if" answers by doing a SIMPLE diagnostic check.
And every newb asks the same question over and over about idling and surging...check your diagnostics.

Follow these steps:
WITH THE KEY OFF
1. Look undwer the dash on the driver side.
2. There is a vertical plug, sometimes with a cover, thats rectangle (this is the Data Link Connector).
3. Looking at the plug youll notice that there are only a few terminals. Now using an voltmeter connect the pos to the TOP LEFT (OBD OUTPT), and the ground to the BOTTOM RIGHT (Ground).
4. Turn the key into the on Position. It will give you a read out it passes. Either Long or short jumps with the needle.

Record your findings then check the code.

It always reads Long jumps then short jumps, and it will repeat over and over.

CODES and Problem
1.8L
LS -02 Sensor
LSS -Air flow sensor
LSSS -Intake air temp sensor
LSSSS -TPS
LSSSSS -Motor position sensor.
LLS -Engine coolant temp sensor
LLSS -Crank angle sensor
LLSSS -No. 1 cylinder TDC sensor
LLSSSS -Speed sensor
LLSSSSS -Barometric Pressure sensor
LLLSSSSSS -Ignition timing adjustment signal
LLLLS -Injector
LLLLSS -Fuel Pump
LLLLSSS -EGR <California>
SSSSSSSS -Normal

2.0L
LS -02 Sensor
LSS -Air flow sensor
LSSS -Intake air temp sensor
LSSSS -TPS
LSSSSS -Motor position sensor.
LLS -Engine coolant temp sensor
LLSS -Crank angle sensor
LLSSS -No. 1 cylinder TDC sensor
LLSSSS -Speed sensor
LLSSSSS -Barometric Pressure sensor
LLLS -Detonation Sensor <Turbo>
LLLLS -Injector
LLLLSS -Fuel Pump
LLLLSSS -EGR <California>
LLLLSSSS -Ignition Coil
SSSSSSSS -Normal

Info From Chilton Manual.
Try it anyway, you never know what could be wrong.
Good Luck...Cheaper than experimenting.:icon16:

good point... plus any threads stickied will be inserted into the FAQ thread :thumbsup: