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Author Topic: TBI Burb dying in gear, My Turn.  (Read 71581 times)

Offline VileZambonie

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Re: TBI Burb dying in gear, My Turn.
« Reply #75 on: June 05, 2007, 08:42:42 pm »
I guess I didn'trealize all you needed was the spring. What happened to yours?
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Offline Captkaos

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Re: TBI Burb dying in gear, My Turn.
« Reply #76 on: June 05, 2007, 09:08:31 pm »
I guess you missed that part of the post.  When I pulled the spare TBI apart (to rebuilld it) its spring had the top broken off.  So I figured the one on there now works so I pulled it off.  When I got to the regulator, the spring was broken in 3 pieces.  No one sells the spring, but Top Down does sell an aftermarket spring that will give it 12-20psi, I just had to modify the cup so I could lower the pressure down to 12/13...  Just finished that a couple minutes ago. 

Hopefully Thursday the spring will be there and I can put the back together.
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Offline Captkaos

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Re: TBI Burb dying in gear, My Turn.
« Reply #77 on: June 08, 2007, 04:15:17 pm »
Springs are here!  I am putting this together now....
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Offline Captkaos

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Re: TBI Burb dying in gear, My Turn.
« Reply #78 on: June 09, 2007, 04:28:21 pm »
Put it on today everything on the TBI is new (TPS, IAC, Injectors, FPR diaphram)
I rebuilt it all yesterday and put it on and one of the injectors was sparaticly not firing.  It did run better and didn't die going into gear, but after I drove it and came to a stop in D it started struggling to stay running, this is when I went back and discovered the sparatic misfire of the injector.
Today I put all new injectors on it and it won't stay running at all.  It runs for about 1 minute and dies.  I am about to put a scanner on it now....
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Offline VileZambonie

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Re: TBI Burb dying in gear, My Turn.
« Reply #79 on: June 09, 2007, 04:42:05 pm »
You should try putting on your good Throttle body and see what happens
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Offline Captkaos

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Re: TBI Burb dying in gear, My Turn.
« Reply #80 on: June 09, 2007, 05:30:08 pm »
The good one is on a 305, but I am at the end of my rope now.  I guess I am going to swap it.....
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Offline Captkaos

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Re: TBI Burb dying in gear, My Turn.
« Reply #81 on: June 09, 2007, 06:34:38 pm »
Ok, I swapped it out and it won't run longer than 4 seconds with the one off my DD.
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Offline Toolmaster

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Re: TBI Burb dying in gear, My Turn.
« Reply #82 on: June 09, 2007, 07:47:52 pm »
You got to be missing something ! :-\

You have been working on this for quite a while, Have you went back and started from scratch ? After all the swaping see if any thing has changed in the testing.

(Taken from other post)
IAC counts at idle,
TBI base gasket?
Is your TPS set at .55V ?
  , pop the oil cap off and see if the engine speed changes and your IAC counts change,
 check your fuel pressure,
 IAC sensor data,
 Reset the IAC,
 Set the TPS to .55V, 
Wow ! That was just from the first page.

What was it they used to KILL THE GRIMLIN'S ?? ???
« Last Edit: June 09, 2007, 08:16:58 pm by Toolmaster »
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Offline VileZambonie

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Re: TBI Burb dying in gear, My Turn.
« Reply #83 on: June 10, 2007, 09:24:16 am »
Agreed - you're missing something simple. It's dying out- you've been focusing on the TBI -you've eliminated that and your fuel pressure. Your ECM and sensor inputs all look good. I'm willing to bet at this point you have an ignition system problem.

Check the resistance of the distributor pick up coil. Typically around 800 ohms. Check it cold and check it hot.

Pull the cap off and check the carbon button.

Check the ignition coil - poor some water on it while it's running and see what happens.
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Offline Captkaos

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Re: TBI Burb dying in gear, My Turn.
« Reply #84 on: June 10, 2007, 10:30:38 am »
I agree, right before swapping I was talking to Toolmaster on the phone and indicated it can only be ignition left.  I hope I can get to it today.  I couldn't do anything yesterday.  After I pulled the TBI off my DD, it tore the intake gasket and have to steal it from the Burb.  I have to pick one of those up before I can move forward.
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Offline DnStClr

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Re: TBI Burb dying in gear, My Turn.
« Reply #85 on: June 10, 2007, 02:34:48 pm »
Try resetting the iac again?
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Offline Captkaos

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Re: TBI Burb dying in gear, My Turn.
« Reply #86 on: June 10, 2007, 11:03:21 pm »
Well I got pissed..  After checking the coil pickup (810 ohms), I said to heck with it, went and got a new cap, rotor and coil.  Cap coil contact spring was broken, replace it and the rotor, nothing.  Replaced the coil, nothing changed.  The coil was the original GM one, so I yanked it. 

When I pulled the cap/rotor, the insides of the distributor was rusty.  I am thinking I will replace it next.  I took a video of it from when I cranked it to when it just dies...

http://www.73-87chevytrucks.com/temp/TBI_Burb.ASF (use Media Player)

Quote from: DnStClr on June 10, 2007, 02:34:48 pm
Try resetting the iac again?

Tried that....
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Offline Captkaos

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Re: TBI Burb dying in gear, My Turn.
« Reply #87 on: June 12, 2007, 02:33:34 pm »
Anyone got a recommendation on a distributor?  I am looking at MSD or Accel, but opinions are welcome.
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Offline VileZambonie

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Re: TBI Burb dying in gear, My Turn.
« Reply #88 on: June 12, 2007, 03:30:06 pm »
Just rebuild yours it's wicked easy. Get a new pickup coil and module. Drive the pin out of the drive gear. If you look at the drive gear it has a dot on one side. That dot faces the same direction as the rotor on the pole piece. Take out the pole piece and replace the pick up coil. I usually wire wheel the pole piece and lube it with some engine oil but not too much.
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Offline dumbucket1

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Re: TBI Burb dying in gear, My Turn.
« Reply #89 on: June 12, 2007, 03:31:38 pm »
have you tried to replace the ignition module with a known good one? I've had similar symptoms with vehicles I'v had in the past that a new ignition module cured.
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