Use this tag for generic questions related to tools, techniques and methodologies for diagnosing problems. Do not use this tag for case-specific problems, the "troubleshooting" tag is better suited for that.
Questions tagged [diagnostics]
138 questions
9
votes
2 answers
What is the "propane test" and how is it carried out?
This test is often mentioned in the context of figuring out what's wrong with a car engine's operation (misfires, hesitation, poor fuel economy, etc.)
What is this test and what does one need to perform it?
Zaid
- 39,111
- 48
- 142
- 290
5
votes
1 answer
How to Improve My Diagnostic Process
I had some problems which I suspected were related ( diagnostic index at pg. 150 in 98 US WSM ):
idle speed too slow and excessive engine shake pg. 167
Hesitation / Stumble: Momentary pause at beginning of acceleration, or during acceleration pg.…
Robert S. Barnes
- 15,708
- 69
- 148
- 239
3
votes
4 answers
Simple fool proof way to identify Bank1 and Bank2 side
Is there a simple and fool proof way to locate which "side" of the engine Bank1 or Bank2 is on, with reference to OBDII data?
For example, you read ODBII live data and find that Bank2 Sensor2 (downstream) O2 sensor is not stable, but Bank1 Sensor2…
Chris
- 905
- 3
- 9
- 19
1
vote
0 answers
Replaced transmission now car wont start
Had my transmission replaced drove car for three days now it won't start. Lights and radio work. No crank no start. Replaced battery, starter, and starter relay.
PLEASE HELP HAVEN'T HAD MY CAR A YEAR BEEN CARLESS SINCE CHRISTMAS
Amber Owens
- 11
- 1
- 2
1
vote
1 answer
Why does a diagnostic tool that can erase messages cost so much more?
My check engine light was on, so I went to an O'Reiley's to buy a diagnostic tool. Basically, they had two versions of the same brand: one that just checked the engine codes and gave you the translation, and one that could read codes and also delete…
GGMG-he-him
- 113
- 5