Of course. Different story for you but it's surprising how many with stock engines waste money on excess octane. Use of the Butt Dyno is always amusing too. Ah well, their cars and their money.
For anyone interested, probably more than you ever wanted to know about gas: http://tinyurl.com/yx7c4o
87 for 20 years. Has always run perfect. Iirc that's what the early model manuals say to use and so I do. I have far better things to spend money on than resistance to detonation the engine doesn't require and that's all octane does. On the rare occasion I've run higher I've never felt a...
Could be. You know how often it turns out to be the simple stuff. Because I work on aircraft I tend to assume people take care when they do things but I've learned it's not always the case. The recent thread about mistakes has driven that point even further home ;)
Yes he does. Along with an apparently odd taste in sexual partners. The sad part is he's clueless enough that your comment is only likely to encourage him. I wonder if he talks like that to strangers in public. I also wonder why he'd expect help from them if he does. Oh wait, this forum couldn't...
Well, I guess it's possible. Sure seems unlikely though. But If you're sure of it who am I to argue.
Maybe the guy was referring to very cold air temps and the resulting decrease in viscosity. The way he worded it just seemed odd.
The knock sensors are tuned to a very specific frequency and amplitude, one that is the signature of detonation. The odds of rod knock generating that signature are slim to none. I suppose it's within the realm of possibility but it'd be an extremely rare event. I won't even try explaining the...
Lol, I can assure you your rep is safe my friend...your record stands on it's own merit. Vf is not often used in other than the normal way. I had to look it up myself to be sure I was getting it right.
1) Forget the 5 volts on Vf at idle. It's not relevant if T is grounded.
2) Yes, 0 volts off idle means open loop. If the O2 sensor is good the engine is lean. If it's bad the engine is slightly rich because the ECU will ignore the bad sensor and default to slightly rich when it sets the code...
I was referring to your acceptance of 3p's suggestion. He's confused. Since I've never seen him wrong about anything before he's entitled once in a while. We all are. That said you should answer the man's question about your meter. He's trying to help you, as am I. (God only knows why ;)).
As...
Err, someone's not paying attention. Don't forget the TPS in all this. Vf with T grounded and IDL closed reflects code status, not O2 emulation. The 5 volts at idle with T grounded is saying there are no codes set in memory. It has nothing to do with being rich. You need to be off idle to see O2...
It's going to jump around a lot at 2500 so checking it at idle is better when using OX. 200 mv is a bit low for the meter setting because the raw sensor signal should cross count between about 100 mv and 800 mv. That's why using Vf is better, because the ECU bumps it up to swing between 0 and 5...
Well, the sytsem is stuck lean then. Doesn't make sense though. Without E and T jumpered Vf shows things to be OK but with them jumpered there's no cross counting. That's highly unlikely. Set you meter to millivolts and measure the OX terminal. See if it's jumping around.
No cross counting. The system is either in open loop (or driven full lean) or the O2 sensor has failed. Hold the engine at 2500 with T and E jumpered and try again.
Johnathan, you can use Vf one of three ways depending on T and E being jumpered and the IDL contact in the TPS being opened or closed:
1) T and E jumpered @ idle: Vf shows whether codes are present or not. 5 volts means no codes are present, 0 volts means codes are present.
2) T and E...
A bit confused am I Colin. Do you want ignition switched +12? It's all over the car. Even on the ECU. Everything off the ACC, IG1, or IG2 line is switched. The only ECU controlled switched power is the main relay output (M-REL). This in turn switches power to the ECU on the +B and +B1 terminals...
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