RTH engine starts then stops. What safety system is there?

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@2fpower -

I would like to understand how ECU orientation changed this, but bottom line - CONGRATULATIONS!

Santa musta been flying a ‘warm-up pattern’ in your time zone, so it’s awesome you got this to fire off.

Merry Christmas!
 
I really appreaciate and am thankful for this MUD family. The words of encouragement and troubleshooting help is so appreciated.

I am tearing up because I do miss Kevin (tools-r-us) as I am sure he would have told me on the third posting of this thread to turn the ECU over. I also miss my good fried Rob (Robkc) as he would have been over helping and encouraging me throughout the process.

Cheers to all and warmest blessings for a wonderful new year.
 
Yeah, I admit I thought of Kevin a few times too.
 
I got the exact same start and die like your video when damaged/disconnected the wires going to my MAF.

Glad you got it running.
 
thatcabledude said:
The ECU must have a mercury switch inside to shut the engine off if the truck ends up on it’s lid.

:hillbilly:








Kidding about the mercury.
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You may know more than you know. I think he should turn the ECU upside down, not doing anything else, and see if the truck turns off like it did to begin with. If it does then there must be some sort of component in there that does it. If not he must have had a poor connection that he fixed inadvertently.
 
For what's its worth I've left the ecu hang upside down from the harness for weeks without a problem. Swapping ecu with others and what not while chasing a problem.
 
First off, I started the car as it sits and then took the ECU and turned it 360 degrees, with no change. Then turned the car off, turned it upside down and restarted with no problems, so must have been a bad connection.

@bigredmachine

I forgot to keep the harness for the "pwr" button (next to the 2nd gear start button next to the gear shifter) before I hacked up that harness. It is on the harness that runs back and under the driver seat to the middle console.

I am trying to find it in the diagram, but don't know what to call that button. I don't see it on the diagram for the ECU either.

Also, I know it changes the shift points, which will not matter for me, but I thought it also changed the timing. Anyone?
 
The 1995-up 2nd start switch doubles as the power switch.
 
cruiserdan said:
The 1995-up 2nd start switch doubles as the power switch.
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Let me clarify. All of my rigs are 95-97, and there is one assembly with two switches on it. The 2nd start and the power switch.
 
2fpower said:
Let me clarify. All of my rigs are 95-97, and there is one assembly with two switches on it. The 2nd start and the power switch.
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The catlog refers to it as "switch assy, pattern select".
 
cruiserdan said:
The 1995-up 2nd start switch doubles as the power switch.
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Are you referring to the switch itself as being same like/kind - or are you stating that 2nd start (trans goes directly to 2nd so you’re **less likely** to spin from a dead stop on compact snow, etc) - but then you get the extended shift points / RPM held longer before 3rd hits?

I thought 2nd just started you in 2nd gear, no more.

PWR button was just holding the shift points longer between shifts, nothing more.

—————————

I’ll add that when I‘ve been using 2nd start, my attention is 100% on the path in front of me & ‘taking it easy’ - if it held the shift points, I wasn’t paying a lick of attention to the cluster.
 
LINUS said:
Are you referring to the switch itself as being same like/kind - or are you stating that 2nd start (trans goes directly to 2nd so you’re **less likely** to spin from a dead stop on compact snow, etc) - but then you get the extended shift points / RPM held longer before 3rd hits?

I thought 2nd just started you in 2nd gear, no more.

PWR button was just holding the shift points longer between shifts, nothing more.

—————————

I’ll add that when I‘ve been using 2nd start, my attention is 100% on the path in front of me & ‘taking it easy’ - if it held the shift points, I wasn’t paying a lick of attention to the cluster.
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My explanation was a bit vague. :doh: It was one of those phone finger replies that old fat-fingered guys like me suck at. :rofl:

The 95-97 2nd Start switch is a two button switch. One button activates 2nd start and the other activates power (which moves the shift points up).
 
^



:rofl:
cheers,
george.
 
cruiserdan said:
My explanation was a bit vague. :doh: It was one of those phone finger replies that old fat-fingered guys like me suck at. :rofl:

The 95-97 2nd Start switch is a two button switch. One button activates 2nd start and the other activates power (which moves the shift points up).
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What's not crystal clear here is he is using the engine and harness from a LX450 with A/T and placing it in a 7X series with a MANUAL transmission.

He doesn't need or can use the PWR/2ND switch, his question is if using that switch changes TIMING settings. This will affect how he does finish wiring.
 
Meaning ignition timing? If so, I can't say. I kinda doubt it however.
 
I am going to assume it is all transmission, and move on.....


This thing is so light, it should have plenty of power.
 
cruiserdan said:
Meaning ignition timing? If so, I can't say. I kinda doubt it however.
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In all the years of MUD, I’d never seen anybody reference ignition timing - just it raising the shiftpoint / all function in the trans case.

-So if this is ultimately seeing a manual trans, no issue pulling it from your harness.
 
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