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Author Topic: 3.4 swap runs but sputters smooths out then dies smells very rich  (Read 31102 times)

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Sandman87

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Re: 3.4 swap runs but 2000k idle ??
« Reply #15 on: March 08, 2020, 07:07:19 pm »
Yeah I'll try to get back out there tomorrow night and take a look at the intake side of the metal EGR tube and see if it's cracked or anyting
Mike

Sandman87

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Re: 3.4 swap runs but 2000k idle ??
« Reply #16 on: March 08, 2020, 07:07:51 pm »
I'll head back out there tomorrow night and try to see if there is a crack in the metal EGR tube on the intake side
Mike

GTRS Fiero

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Re: 3.4 swap runs but 2000k idle ??
« Reply #17 on: March 08, 2020, 07:08:55 pm »
Is it flooding when it doesn't start?  You need to check the injectors.

Sandman87

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Re: 3.4 swap runs but 2000k idle ??
« Reply #18 on: March 08, 2020, 07:10:24 pm »
No I don't think it's flooding because it will start back up if I use starting fluid I think it's starving for fuel because it's getting too much air and or the fact that I have a vacuum leak isn't allowing the fuel pressure regulator to operate properly and not allowing fuel to get to the injectors
Mike

GTRS Fiero

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Re: 3.4 swap runs but 2000k idle ??
« Reply #19 on: March 08, 2020, 09:16:38 pm »
Since you have fuel pressure at the Schrader valve, you should have enough pressure.  Since it isn't flooding, and doesn't seem to be getting enough fuel, you likely either have clogged injectors, or the fuel injector fuses are blown.  The fuel injectors are directly on yhe fuel rail.  Since you have pressure in the fuel rail, vacuum isn't preventing fuel from getting to the injectors.  You should have at least 43 PSI.  All the details are in the July 2019-ish newsletters.

Is the throttle plate opening and closing correctly?  Did you get the IAC tube secured?

BTW, if your engine is really running at 2,000K RPM, there are probably bits all over.  Likely either 2K RPM or 2,000 RPM.
« Last Edit: March 08, 2020, 10:17:08 pm by GTRS Fiero »

TopNotch

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Re: 3.4 swap runs but 2000k idle ??
« Reply #20 on: March 08, 2020, 09:46:37 pm »
With the engine cold, start the car and try wiggling the EGR tube before it has a chance to get hot. If you hear a changing hiss as you wiggle it, your EGR tube is cracked, and is the source of a vacuum leak.
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Fierofool

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Re: 3.4 swap runs but 2000k idle ??
« Reply #21 on: March 08, 2020, 10:05:04 pm »
I agree with what GTRS said about having pressure at the rail but it's not getting through the injectors.  There are 2 injector fuses. Marked INJ 1 and INJ 2.  A bad MAP sensor can cause this condition, too.  The vacuum line from the MAP going underneath the intake is the one that controls the pressure regulator. 

The EGR tube will be your likely vacuum leak.  I've used a hand held propane torch to check for leaks when the engine is running.  The hose GTRS mentioned is a good method.  The vacuum you hear may be coming from the throttle body, itself.  It does have a loud hiss. 

To test for leaks with a propane torch, remove the tip of the torch.  Then slide a piece of rubber hose over the tube.  You can turn on the tank at a very low setting without igniting it and pass the end of the hose over any areas suspected of a vacuum leak.  The engine will speed up when you hit the spot.  There is very little chance of any fire due to the low flow of propane. 
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GTRS Fiero

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Re: 3.4 swap runs but 2000k idle ??
« Reply #22 on: March 08, 2020, 10:15:43 pm »
When testing my MAP sensor, I ended up unplugging it.  Most of the stuff should be covered in the March 2019 newsletter.

Sandman87

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Re: 3.4 swap runs but 2000k idle ??
« Reply #23 on: March 09, 2020, 09:03:57 am »
Awesome thanks for the tips .I will give this a try after work and report back .

So glad to have all the help! Thanks
Mike

Sandman87

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Re: 3.4 swap runs but 2000k idle ??
« Reply #24 on: March 09, 2020, 09:13:37 am »
PS. My tach filter is missing . Hope I can find it . Other wise I'll get one from Rodney .
Mike

Sandman87

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Re: 3.4 swap runs but 2000k idle ??
« Reply #25 on: March 09, 2020, 10:28:03 am »
Does anybody know the AC Delco part number for the tach filter?
Mike

TopNotch

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Re: 3.4 swap runs but 2000k idle ??
« Reply #26 on: March 09, 2020, 10:59:37 am »
I don't know the part number, but you can build your own...

You should be able to find these components at an electronic parts store, such as Fry's.
In the good old days, Radio Shack would be the place to get the parts.
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Sandman87

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Re: 3.4 swap runs but 2000k idle ??
« Reply #27 on: March 09, 2020, 11:21:04 am »
Awesome !
Mike

Fierofool

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Re: 3.4 swap runs but 2000k idle ??
« Reply #28 on: March 09, 2020, 12:30:49 pm »
The tach filter is kinda hidden down between the coil and the end of the valve cover.  It's usually a gray cylinder about the size of a TNT firecracker.  It has 2 wires and a white connector on the wires. 

I have a couple of spare filters.  If you want to come to the meeting Saturday, I'll bring one if you'll just let me know. 

I just thought of another place where you may have a vacuum leak or a misfeed.  The EGR solenoid has a small looped tubing.  That tubing or the rubber sleeve on the end can fail.  Usually the rubber tubing rots and becomes porous.  I replace the whole tube with a piece of vinyl tubing scavenged from a fish tank aerator. 

A manufactured vacuum misfeed can be created by swapping the 2 hoses from the end of the EGR solenoid, either at the solenoid or at the rubber connector where they go to the lines on the trunk wall.  One of those lines goes to a ported connection on the evap canister.  The other isn't ported, so it's open all the time.  If connections are reversed, you can be pulling vacuum on an open line. 

There are three kinds of men:

1.    The ones that learn by reading.
2.    The few who learn by observation.
3.    The rest of them have to pee on the electric fence and find out for themselves.    Will Rogers

Sandman87

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Re: 3.4 swap runs but 2000k idle ??
« Reply #29 on: March 09, 2020, 12:55:57 pm »
yeah I know what vacuum lines you speak of that go to the rear of the trunk and then turning the hard lines there two different sizes I have the big one in the big one and a little one in the little one. And I know what the tach filter looks like it's just missing completely. So for the time being until one arrives or I find mine I'm just going to bypass it to get some kind of tach going.my EGR valve only has one black plastic line going to the top of it and then the big half inch metal tube .
Mike