Hey guys,
I've got a 69 Cougar with a 351w. My MSII has been installed and assembled correctly, but for some reason when I start the engine, it revs up to 3000 rpm at idle. I can't figure it out. My throttle blade is almost completely closed, I'm running an IAC, but it's plugged tight and shut off. There's only two vacuum lines running off my engine, and I've got them both plugged (my MSII is still hooked up). I can't figure out how the engine is getting enough air to run up this high? I know the answer should be a vacuum leak, but I there's only two lines off my intake and they're both plugged. Anybody seen anything like this before? I don't consider myself I dumb guy, but I'm starting to feel that way. Thanks for your help guys, I love reading the posts and learning from all of you! As far as I'm concerned, the guys running MS are the smartest around.
- I'm also looking for a better VE map and spark table to use as a starting point for tuning my car. Can anyone point me in the right direction? Thanks!
1969 Mercury Cougar
bored .030 over
mild cam, .488 lift
polished & ported heads
Edlebrock Performer RPM EFI intake (super long runners)
Custom built 75 mm throttle body w/t IAC
19lb injectors (have a 24lb set to install if needed)
Ceramic Headman Headers, 2 1/2 exhaust
EDIS 8
electric fans, fuel pump, etc.
Wide ratio AOD w/t 2600 rpm stall
Engine Reving up at idle
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). 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.
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.
Re: Engine Reving up at idle
Thank you for you guidance Lance! I'll follow your instructions and see what I can come up with.
Re: Engine Reving up at idle
Cougar69,
Did you determine why the idle is so high?
Did you determine why the idle is so high?
"Any problem that is persuasive, persistent, or unprecedented is unlikely to be solved by hand me down principals."