[MLB]

Getting close to finishing the installation.

I'm both impatient and terrified of starting it for the first time

:0)

   

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[Ryan]

Looking clean in there

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[986boxster1998]

Looks great, good work!

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[az968]

Nice clean installation, you've been working up to this point for quite a while, enjoy!!

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[type968]

What have you found most difficult so far?  Did you get stage II?  

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[flash]

stage 2 is no longer available.  it's 1 or 3

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[MLB]

Installation went pretty smoothly, just Took me a couple weeks off and on. And I deep cleaned everything along the way. got to take your time and read through the instructions multiple times. There were a couple missing or incorrect parts which flash is quickly on the path to fixing.

Now I'm just troubleshooting a lumpy idle, which must be something I haven't got put back together all the way yet. More to come

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[MLB]

Using my IR thermometer gun i found cylinders two and three were cold (below 200°F at the exhaust manifold) while 1,4 were over 450° After running the car for a minute or two. So I've got a misfire or no spark or somesuch problem on cylinders 2 and 3. I have concerns about brittle aging wires for the electric fuel injector connections. (I swapped fuel injectors back to my original's just to rule out a problem with the injectors)

What else should I be checking?

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[banditsc]

If you have a helper or can look under the hood from inside the car, pull the plug wires off all of them and pull the plugs from the two that are not working and do a check for spark on them while cranking.

 

Of course also make sure both ends of the wires are tight and the injector wires are tight and on the proper injector.

 

Check you firing order also..

   

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[MLB]

Grrr, looks like my non-original distributor cap got it wrong, and I trusted it instead of checking them Internets.

   

OK trying again...

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[az968]

That's still the same order, isn't It? 1 - 3 - 4 - 2 and 2 -1 - 3 -4.

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[banditsc]

The picture I posted is of my original distributor cap.

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[MLB]

The sticker gives three pieces of information, one of which is the diagram of the distributor cap positions.The circled numbers top to bottom are 3124, my replacement Is 2134, which shows that cylinders two and three are wrong on my distributor cap

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[az968]

Interesting, the sticker has two sets of numbers, each in different order if I"m reading it right?

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[MLB]

As I said, the sticker gives three pieces of information

1. The cylinder order from front to back is 1234

2. The firing order is 1342

3. The distributor cap order is 3124

Got it? :0)

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[MLB]

OK got the new fuel injectors back on (I swapped in the old ones just to rule out a problem with injectors), fuel pressure verified at 53 PSI, running better but not perfectly smooth yet. Exhaust manifold temperatures for cylinders one through four (front to back) were 550, 380, 250, 500 after running for a minute or two and shutting off the engine.

So still something not right about cylinder two and especially three, but getting closer...

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[banditsc]

Might have to pull those plugs, they may have gotten fouled out, lots of fuel being pumped in there and improper spark.

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[flash]

if the problem does not become evident, check the cam timing

 

have you put a vacuum gauge on it yet?  it should show no less than 17" at idle, and be stable

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[MLB]

Thanks for the replies

I did pull the plugs and they werent pretty

I put in my old set of heat level sixes just so I could continue troubleshooting without delay.

I agree that cam timing is worth revisiting but is it likely to have this effect only on cylinders two and three?

   

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[flash]

switch the positions of the injectors.

 

have you done a blink test?  do you have a durametric?

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