When driving I'll get a sudden yank, look at my air/fuel and it will be 11:1 or so. This is under normal cruising speeds. It will happen for a split second than go back to regular air/fuel. It happens at random intervals, sometimes not at all. Might happen once out of a 15min drive, may happen 4 times.
Could this be a sign of a bad injector??
Rich spike every so often...
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
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Buick pwr'd Brit
- MegaSquirt Newbie
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- Joined: Tue Aug 22, 2006 8:48 pm
- Location: Wa st.
Re: Rich spike every so often...
Plato2k5
Could be the accel enrich kicking in. This can happen if the Map or TPS threshold is set to low in the accel tuning data. I find it helpful to run a datalog, and set up one of the graphs to read ARF and accel/enrich. Makes it very easy to spot!
Bill
Could be the accel enrich kicking in. This can happen if the Map or TPS threshold is set to low in the accel tuning data. I find it helpful to run a datalog, and set up one of the graphs to read ARF and accel/enrich. Makes it very easy to spot!
Bill
73 MGB, 215 Buick V8, supercharged, MSII
Re: Rich spike every so often...
This is how I have the accel enrichment set up:
MAP vs TPS is set to 100%, so I'm not relying on the MAP sensor, just the TPS.
TPSdot threshold % is at 20%.
So your saying that the threshold could be to low? How much should I increase this???
I'll have to look through my data log and see if I can find it happening. Unfortunately when I data log, its usually for around 15mins. So I have a lot of information to sort through.
thanks for the help!
MAP vs TPS is set to 100%, so I'm not relying on the MAP sensor, just the TPS.
TPSdot threshold % is at 20%.
So your saying that the threshold could be to low? How much should I increase this???
I'll have to look through my data log and see if I can find it happening. Unfortunately when I data log, its usually for around 15mins. So I have a lot of information to sort through.
thanks for the help!
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Buick pwr'd Brit
- MegaSquirt Newbie
- Posts: 12
- Joined: Tue Aug 22, 2006 8:48 pm
- Location: Wa st.
Re: Rich spike every so often...
20% is high enough where it should be greater that normal TPS noise. Unless you have a worn/bad TPS, that is causing erratic voltage signals. This could "trick" MS into thinking that your moving the throttle more than you really are.
Should show up in the data log, if its causing the problem though.
Bill
Should show up in the data log, if its causing the problem though.
Bill
73 MGB, 215 Buick V8, supercharged, MSII
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devastator
- Experienced Squirter
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- Joined: Mon Feb 11, 2008 10:19 am
- Location: Kinda near Tucson Arizona
Re: Rich spike every so often...
I know of people that rig up a button to ground out the temp sensor for a second in order to "mark" a specific location on a datalog for viewing later. This could help you find your spike faster. Without a datalog of what's happening, it's hard to identify the problem.
Sandrail-ACVW 2276 cc, Turbo
MS-II W/spark burning E85
The sand must be punished.
MS-II W/spark burning E85
The sand must be punished.
Re: Rich spike every so often...
Hmm, I like that idea with the grounding idea.
I tried to Upload my datalog on here but it says the file size is to big???
I tried to Upload my datalog on here but it says the file size is to big???