1.6 M45 - lose a boost coupling and the engine revs out of control
#1
1.6 M45 - lose a boost coupling and the engine revs out of control
I doubt this is a 'new' problem, but I can't find info about it.
I've got an M45/JRSC and MS2. Recently installed the MS2 and working on tuning it.
I was out running the car last night and the coupling right at the S/C outlet blew off. I didn't know that right away but did after I inspected the engine bay. What I did find was that, if I ran the engine, it would rev. I'd cut the ignition before anything really happened, but I believe it would rev right past the limiter and blow the engine.
I'm wondering if it's related to the throttle body being before the S/C. I have lost this coupling before with the stock ECU, but the engine would stumble and not run as opposed to this. I now have a T-bolt clamp on that coupling...
Any advice? Is there a parameter in MS that I can/should adjust for this?
I've got an M45/JRSC and MS2. Recently installed the MS2 and working on tuning it.
I was out running the car last night and the coupling right at the S/C outlet blew off. I didn't know that right away but did after I inspected the engine bay. What I did find was that, if I ran the engine, it would rev. I'd cut the ignition before anything really happened, but I believe it would rev right past the limiter and blow the engine.
I'm wondering if it's related to the throttle body being before the S/C. I have lost this coupling before with the stock ECU, but the engine would stumble and not run as opposed to this. I now have a T-bolt clamp on that coupling...
Any advice? Is there a parameter in MS that I can/should adjust for this?
Last edited by mc85; 03-04-2013 at 09:18 AM.
#4
Could it not be reacting fast enough?
#5
Elite Member
iTrader: (1)
Join Date: Jun 2006
Location: Warrington/Birmingham
Posts: 2,642
Total Cats: 42
The problem is that the rev limiter does NOT appear to be working. I have it set at 7100 RPM. From what I could see on the tachometer and hear from the engine, it blew right past it before I cut the ignition.
Could it not be reacting fast enough?
Could it not be reacting fast enough?
I'm massively impressed you can tell engine RPM by ear too
#6
Boost Czar
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,729
Total Cats: 4,126
Sorry, I didn't mean to say I was concerned about the engine revving. I understand that it's like having the throttle completely open.
The problem is that the rev limiter does NOT appear to be working. I have it set at 7100 RPM. From what I could see on the tachometer and hear from the engine, it blew right past it before I cut the ignition.
Could it not be reacting fast enough?
The problem is that the rev limiter does NOT appear to be working. I have it set at 7100 RPM. From what I could see on the tachometer and hear from the engine, it blew right past it before I cut the ignition.
Could it not be reacting fast enough?
a 7100 limiter will look like ~8200 on your gauge cluster, because cheapcar.
#7
There is no reason why the rev limiter would not have worked?
#9
Thank you and your reliable source.
Thanks guys for the advice this morning. I will assume that the tachometer was way off if 8400RPM would have meant engine failure. I can understand that having the engine running WOT with basically no restriction could cause the tachometer to sweep too fast. Almost seemed too fast for TS to even register it.
I would be tempted to disconnect the coupling and make sure it hits the rev limiter, but probably not. It sure seemed like the thing was past 7100RPM.
Thanks guys for the advice this morning. I will assume that the tachometer was way off if 8400RPM would have meant engine failure. I can understand that having the engine running WOT with basically no restriction could cause the tachometer to sweep too fast. Almost seemed too fast for TS to even register it.
I would be tempted to disconnect the coupling and make sure it hits the rev limiter, but probably not. It sure seemed like the thing was past 7100RPM.
Thread
Thread Starter
Forum
Replies
Last Post
elesjuan
Build Threads
7
11-03-2015 01:51 PM
SuperSneakySecretSquirrel
Meet and Greet
5
09-06-2015 08:30 PM