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Search took 0.04 seconds. Search: Posts Made By: big911fan
Forum: Porsche 911 Technical Forum 08-08-2019, 07:25 AM
Replies: 54
Views: 3,413
Posted By big911fan
Really glad that solved your problem. I think...

Really glad that solved your problem. I think I'll pull all my injectors and send them out for a good cleaning.

The thing that still puzzles me is why would all three injectors on the same side go...
Forum: Porsche 911 Technical Forum 08-07-2019, 06:31 PM
Replies: 54
Views: 3,413
Posted By big911fan
Nick- Congrats on solving the problem. Can I...

Nick- Congrats on solving the problem. Can I assume the three injectors they replaced were the ones running rich?

Can you PM me with the name of the place that "cosmetically" cleaned your...
Forum: Porsche 911 Technical Forum 08-03-2019, 02:00 PM
Replies: 54
Views: 3,413
Posted By big911fan
Since two of us are having a similar problem can...

Since two of us are having a similar problem can I ask you too expand on your post.

If the fuel pressure regulator diaphragm is damaged would fuel be sucked into both intakes fairly equally or is...
Forum: Porsche 911 Technical Forum 07-28-2019, 09:35 AM
Replies: 54
Views: 3,413
Posted By big911fan
I'm sure you're getting anxious to get the car...

I'm sure you're getting anxious to get the car back. Wish I could help more but I can't get my car in to have it looked at until early Sept. because of other commitments.

I still wonder if all...
Forum: Porsche 911 Technical Forum 07-28-2019, 08:29 AM
Replies: 54
Views: 3,413
Posted By big911fan
Nick- Since we're both having what appears to be...

Nick- Since we're both having what appears to be an identical problem I'm following your posts and resulting comments carefully for the final solution. We've had a lot of good suggestions here but...
Forum: Porsche 911 Technical Forum 07-25-2019, 11:20 AM
Replies: 54
Views: 3,413
Posted By big911fan
Nick- Did you by any chance run you car with the...

Nick- Did you by any chance run you car with the engine temp sensor disconnected or loose? It's the top sensor in the bracket on the drivers side (with the three sensors in the bracket).

I...
Forum: Porsche 911 Technical Forum 07-25-2019, 09:50 AM
Replies: 54
Views: 3,413
Posted By big911fan
I suppose it's possible for the chain to jump a...

I suppose it's possible for the chain to jump a tooth on one bank but my car is running so strong I find that unlikely. That's why a vacuum leak on the intake port is a possibility. I agree that...
Forum: Porsche 911 Technical Forum 07-25-2019, 09:40 AM
Replies: 54
Views: 3,413
Posted By big911fan
In addition to my post above, I have the book...

In addition to my post above, I have the book called Bosch Fuel Injection & Engine Management written by Charles O. Probst, SAE. He has very detailed descriptions of the L-Jetronic system that I'm...
Forum: Porsche 911 Technical Forum 07-25-2019, 09:29 AM
Replies: 54
Views: 3,413
Posted By big911fan
I posted a thread called "Need Help With Plug...

I posted a thread called "Need Help With Plug Reading" a couple of weeks ago and it had pics of my plugs. Maybe you can find that thread and look at my plugs to see if they're similar to what you're...
Forum: Porsche 911 Technical Forum 07-25-2019, 06:43 AM
Replies: 54
Views: 3,413
Posted By big911fan
It was me that posted a similar issue a couple of...

It was me that posted a similar issue a couple of weeks ago and I still have not tackled the problem.
What I discovered is that the fuel injector for bank 1-3 and 4-6 come off terminals 14 and 15...
Forum: Porsche 911 Technical Forum 07-14-2019, 12:47 PM
Replies: 15
Views: 1,107
Posted By big911fan
Thanks for all the tips. Now I need to decide how...

Thanks for all the tips. Now I need to decide how lazy I am.

Looks like FI cleaning is very effective based on the before/after results.

Have you noticed a big difference in driveability,...
Forum: Porsche 911 Technical Forum 07-14-2019, 09:42 AM
Replies: 15
Views: 1,107
Posted By big911fan
How big of a PITA was removing the FI rails to...

How big of a PITA was removing the FI rails to get at the injectors. Ultimately I'd like to send mine out for a rebuild also.

On the left bank (cyl 1-3) there is a bracket holding the three...
Forum: Porsche 911 Technical Forum 07-14-2019, 08:10 AM
Replies: 15
Views: 1,107
Posted By big911fan
Fuel Injector Harness Question

I want to check the resistance across my fuel injector terminals and need to remove the injector harness.

I know it has clips on the harness but don't know if I can just pull the harness off the...
Forum: Porsche 911 Technical Forum 07-10-2019, 10:31 AM
Replies: 41
Views: 3,106
Posted By big911fan
No slope involved, car is parked in the garage...

No slope involved, car is parked in the garage when it's shut off.

If reading the plugs after a plug change is not ideal I think the next step has to be a smoke test to see if there's a vacuum...
Forum: Porsche 911 Technical Forum 07-09-2019, 05:34 PM
Replies: 41
Views: 3,106
Posted By big911fan
Here's kind of where I'm at after digesting all...

Here's kind of where I'm at after digesting all the suggestions.
1. There are new Bosch plugs in now. That's why I pulled the old ones.
2. If 76FJ55 is correct and there is a bridge to terminal 14...
Forum: Porsche 911 Technical Forum 07-09-2019, 01:15 PM
Replies: 41
Views: 3,106
Posted By big911fan
I hear you. That's my plan but still want to do...

I hear you. That's my plan but still want to do the simple tests I listed. With the left bank running lean I just didn't want to risk burning a piston or something. Then again maybe it's a little OCD...
Forum: Porsche 911 Technical Forum 07-09-2019, 12:07 PM
Replies: 41
Views: 3,106
Posted By big911fan
Thanks for all the input. Don't want to start any...

Thanks for all the input. Don't want to start any arguments here. For clarification, the engine has never been rebuilt. Original 45K miles since new.

I talked to a local mechanic and he has a...
Forum: Porsche 911 Technical Forum 07-09-2019, 07:47 AM
Replies: 41
Views: 3,106
Posted By big911fan
The car has original miles. I have records going...

The car has original miles. I have records going back to '97. Mileage sequence looks consistent so no reason to believe any major work done.

The only repair of note was the left camshaft oil line...
Forum: Porsche 911 Technical Forum 07-09-2019, 07:14 AM
Replies: 41
Views: 3,106
Posted By big911fan
Yes, I'm guilty of not driving often enough or...

Yes, I'm guilty of not driving often enough or hard enough. Too many vehicles...

The theory about the left bank of cyls running lean makes sense. If there's a vacuum leak on the left side maybe...
Forum: Porsche 911 Technical Forum 07-08-2019, 06:04 PM
Replies: 41
Views: 3,106
Posted By big911fan
Thanks for the ideas. The engine is bone stock...

Thanks for the ideas. The engine is bone stock with only 45K miles. I've never checked compression or done a leak down test. The engine runs well so I had no need. When the NGK's were installed I...
Forum: Porsche 911 Technical Forum 07-08-2019, 04:08 PM
Replies: 41
Views: 3,106
Posted By big911fan
I see this board isn't what it used to be. Namely...

I see this board isn't what it used to be. Namely helpful....
Forum: Porsche 911 Technical Forum 07-08-2019, 03:16 PM
Replies: 41
Views: 3,106
Posted By big911fan
Yes I've seen and used those charts. My question...

Yes I've seen and used those charts. My question is "Why is there a noticeable difference between the two banks of cylinders.

Cyls 1-3 look fine to me. Cyls 4-6 are lightly carbon fouled. What...
Forum: Porsche 911 Technical Forum 07-08-2019, 02:38 PM
Replies: 41
Views: 3,106
Posted By big911fan
From prior posts on this site a long time ago the...

From prior posts on this site a long time ago the NGK plugs were recommended as well as Bosch. I replaced the NGK's this time with Bosch Super Plus WR 7 DC+.

The NGK's were installed in 3/2013 and...
Forum: Porsche 911 Technical Forum 07-08-2019, 10:08 AM
Replies: 41
Views: 3,106
Posted By big911fan
Addition to my plug post

Sorry. I forgot to mention that the plugs were NGK BPR6ES.
Forum: Porsche 911 Technical Forum 07-08-2019, 10:06 AM
Replies: 41
Views: 3,106
Posted By big911fan
Need help with plug reading

I recently changed the plugs on my '89 Carrera after about 5K miles. Attached is a pic of the plugs. As you can hopefully see plugs 1-3 look like they burned very nicely.

Plugs 4-6 are clearly...
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