Hello,
I have an MSII V3 installed on a 87 300ZX turbo. I have a very rare problem - I have a standard wiring setup and when I go under boost (about 5 psi) I am blowing the 2A fuse for the MS, and the two 5A fuses for the injectors. It seems like this problem only happens under boost. If I drive around slowly I don't see the issue.
During install/intial setup I discovered that I had a short on one of my injector pigtails and blew C16. I replaced and fixed the short and everything seems fine except when I step on the gas.
Could anything else be going bad? If I put the MS on the stim and try to replicate the conditions (except for the map value) everything seems ok.
Any help is appreciated.
MSII V3 blowing fuses under boost only
Forum rules
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).
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.
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).
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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Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: MSII V3 blowing fuses under boost only
What is the resistance on your injectors?
Re: MSII V3 blowing fuses under boost only
I figured it out - I had the PWM set to 30% for low impedence injectors (mine read 2.4 ohms) - lowered it to about 15% following the procedure and it appears to be working well.