Misfire all Cylinders (1 Viewer)

[camino70]

It’s barely drizzling so I poured water in the sunroof drain, I can hear it hitting the ground and the pillar wasn’t damp.

I moved to pouring in the gutter, and the dampness returned. I can see it on headliner near where the cable enters the channel.

Water intrusion

• camino70
• Apr 14, 2021

Gutter

• camino70
• Apr 14, 2021

 

[CharlieS]

Vin is not factory etched in the glass. It is often a dealer added item (extra profit).

I’d look at where the cable for that aftermarket antenna goes through the roof.

 

[camino70]

Did they really put it through the roof!? I envisioned it running down the gutter to the firewall.

 

[CharlieS]

Who knows? It isn’t factory, so they could have done it many ways. If you have a leak there, it seems like it may be worth investigating the possibility.

If they ran it through the firewall, you should be able to observe where it penetrates the grommet.

 

[camino70]

Looks like the leak is from the top passenger side of the windshield:

Windshield leak

• camino70
• Apr 16, 2021

Windshield leak

• camino70
• Apr 16, 2021

next step advice?

edit: the satellite cable ran down the gutter to a firewall grommet.

 

[camino70]

I pulled some of the interior out of the passenger seat area. I’ve pulled several plugs and I haven’t yet found any corrosion or signs of water getting that far.

any guidance on how/where to look?

 

[camino70]

I got a few recommendations and got someone to seal it, I haven’t seen water since.

I have run a few 1000 mile tests:
original maf with bypass - maf out of range
Original maf without bypass with block plate - sais valve stuck
New maf with bypass - maf out of range
New maf without bypass with block plate - sais valve stuck

I’m still thinking the bypass is messing with my maf readings.

I removed the plates today and apparently messed something up on the drivers side, exhaust leak. I went to put the plate back in and still an exhaust leak. I can’t seem to find what I broke, bent etc, any ideas?

 

[camino70]

I think my leak is coming from the pipe to flange on the manifold side, not between flanges.

I don’t really like this idea, but not ready to pull/weld/replace the manifold... thoughts?

Air pump tube exhaust leak

• camino70
• May 12, 2021

 

[Cruisin911]

Wait? WTF is going on there? Why is there metal strapping there at all? Clearly, you've got a leak in that area. My advice is to replace the whole part. Are other parts of the truck put together this way? Was the strapping idea to put pressure on the lateral tube against the flange?

 

[camino70]

Wait? WTF is going on there? Why is there metal strapping there at all? Clearly, you've got a leak in that area. My advice is to replace the whole part. Are other parts of the truck put together this way? Was the strapping idea to put pressure on the lateral tube against the flange?

I stole that picture from a Tundra site. Mine currently does NOT look like that, but may soon.
I have an exhaust leak there after messing with the bypass/block off plate. I think its the pipe flange which is part of the entire exhaust manifold, hence my entertaining of above option.

 

[camino70]

i feel the puffs of air from here

3DABE568-EA79-4D4D-A51C-41783AE28DCD.jpeg

• camino70
• May 12, 2021

03833BC6-2BCD-40FF-B2D2-EDA06B244A4C.jpeg

• camino70
• May 12, 2021

 

[Cruisin911]

i feel the puffs of air from here

3DABE568-EA79-4D4D-A51C-41783AE28DCD.jpeg

• camino70
• May 12, 2021

03833BC6-2BCD-40FF-B2D2-EDA06B244A4C.jpeg

• camino70
• May 12, 2021

Looks to me like you have the wrong block off plates. The slots in the plates should line up to the threaded shaft. Your plates appear to be too small. If this is the case, I also wonder if you are running the correct kit for your 5.7 from hewitt...

 

[camino70]

Thanks, but I think they are the right plates, now removed. Regardless that’s not where it’s leaking. You can see the carbon on the nut side of the flange. I only see two options, try the awful metal plate over to sandwich or pull it and weld it up.

Removed block off plate

437B8680-26B5-4BA1-B718-A283FD20C9B9.jpeg

• camino70
• May 12, 2021

 

[camino70]

I replaced the windshield back in May or June, I haven't seen any water intrusion since. I have removed the SAIS bypass and haven't had any CEL's all summer. Our first morning with the temp dipping down and I got SAIS bank 2 failure. When I put power to them, I can hear them spin individually.

I may try the bypass again, but I envision more misfire codes. At this point, my time and money would have been better spent replacing the two air pumps.