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Search: Posts Made By: Tom M'Guinn
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10-15-2018, 10:15 PM
Replies: 31
Views: 849
Posted By Tom M'Guinn

Not sure when your set up was sourced, but see...

Not sure when your set up was sourced, but see this thread and post 76 in particular. No guarantee that's your issue, but certainly worth considering as a cause.
...
10-15-2018, 08:29 PM
Replies: 31
Views: 849
Posted By Tom M'Guinn

I was going to suggest putting the stock parts on...

I was going to suggest putting the stock parts on to see if the issue goes away, but people tend to hate when I say that. :) Maybe ping Joshua to see if he can help during his coffee breaks or...
10-15-2018, 08:24 PM
Replies: 6
Views: 271
Posted By Tom M'Guinn

Plus 1 on a cheap mechanical boost gauge. At...

Plus 1 on a cheap mechanical boost gauge. At least you'll know if it's making pressure that way, which is step 1. If it was making zero boost, I doubt you'd use the word giddy-up, but it may be...
10-15-2018, 12:48 PM
Replies: 31
Views: 849
Posted By Tom M'Guinn

The "open loop" thing on your logger is just a...

The "open loop" thing on your logger is just a way of telling you when your DME is making fuel adjustments based on the O2 sensor, so if you disconnect the O2 sensor, it's "open loop" by definition...
10-14-2018, 11:40 PM
Replies: 11
Views: 247
Posted By Tom M'Guinn

That's quite a list of leaks! I'd probably pull...

That's quite a list of leaks! I'd probably pull the motor too, and bite the bullet on a long list of while-you're-in-there stuff...
10-12-2018, 06:49 PM
Replies: 31
Views: 849
Posted By Tom M'Guinn

Are you bypassing the ISV via the diagnostic...

Are you bypassing the ISV via the diagnostic port? There are circumstances where that also disables the O2 feedback adjustments. What happens if you just pull the connector off the ISV? Or...
10-10-2018, 11:24 PM
Replies: 21
Views: 479
Posted By Tom M'Guinn

The wideband sensor can't take the heat from the...

The wideband sensor can't take the heat from the stock o2 location (and you'd loose your closed loop, which would change your AFR). Sounds like you are running rich based on the plugs. Sure the O2...
10-10-2018, 05:07 PM
Replies: 21
Views: 479
Posted By Tom M'Guinn

I just meant a wideband that you installed...

I just meant a wideband that you installed temporarily for diagnostic purposes, if you aren't into having it all the time.

Tough to test for weak ignition -- and symptoms usually first appear...
10-10-2018, 01:36 PM
Replies: 21
Views: 479
Posted By Tom M'Guinn

Temp sensors, fuel pressure, fuel pump check...

Temp sensors, fuel pressure, fuel pump check valve, dirty/leaking injectors, head gasket coolant in cylinders, DME grounds, vacuum leaks, AFM out of whack, weak ignition, KLR blink codes, TPS,...
10-08-2018, 11:51 PM
Replies: 23
Views: 724
Posted By Tom M'Guinn

Best 1975 or earlier car for 951 Motor?

I'm mulling my next project, with lots of possibilities in play. One idea is putting a high-output 951 engine in a smog-free California car, so that I can do whatever I want with the motor. That...
10-08-2018, 11:20 PM
Replies: 2
Views: 199
Posted By Tom M'Guinn

Get yourself a copy of Roy Smith's book, Porsche...

Get yourself a copy of Roy Smith's book, Porsche 924 Carreras: Evolution to Excellence. It has more info than anyone could ever hope to remember.
...
10-08-2018, 01:29 PM
Replies: 6
Views: 304
Posted By Tom M'Guinn

Agreed, and/or look up the part number you are...

Agreed, and/or look up the part number you are after on PET and order by part number from Pelican, 944online, Paragon, etc.
10-07-2018, 02:18 PM
Replies: 25
Views: 735
Posted By Tom M'Guinn

Not sure we're looking at the same thing, but...

Not sure we're looking at the same thing, but there is a black two-wire connector on the DME harness shown in the picture that has one brown wire (ground) and one brown wire with white stripe that...
10-07-2018, 02:06 PM
Replies: 21
Views: 479
Posted By Tom M'Guinn

That is the adjustment screw. Porsche says...

That is the adjustment screw. Porsche says there's a special tool (9230) to turn it but if you google you'll see people come up with their own hex or similar tools. However, if you are having a...
10-06-2018, 12:52 PM
Replies: 25
Views: 735
Posted By Tom M'Guinn

The altitude sensor uses the two brown wires...

The altitude sensor uses the two brown wires running to the upper right in that picture (with tape on them), not that white unplugged 3-wire connector. The black unused connector in the picture is...
10-06-2018, 12:29 PM
Replies: 25
Views: 735
Posted By Tom M'Guinn

The wires that control the boost gauge are the...

The wires that control the boost gauge are the two with arrows pointing to them below in your picture. The blue one carries the boost signal itself, straight from pin 5 of the KLR. With everything...
10-04-2018, 01:14 PM
Replies: 25
Views: 735
Posted By Tom M'Guinn

Just something that reads DC voltages and Ohms...

Just something that reads DC voltages and Ohms (which they pretty much all do), but an auto-ranging digital unit is probably best and certainly easier to use for beginners. Every car guy needs one....
10-02-2018, 09:51 PM
Replies: 31
Views: 849
Posted By Tom M'Guinn

It's also possible that your car is just running...

It's also possible that your car is just running so rich that it is outside the range of what your closed-loop system can make up for. .88v at idle is high for other systems, though don't know about...
10-02-2018, 07:38 PM
Replies: 25
Views: 735
Posted By Tom M'Guinn

Right, so that means you have the flat black...

Right, so that means you have the flat black 8-pin connector in the footwell, rather then the red square 4-pin version, and the boost gauge wire is *probably* blue, rather than red/white like on...
10-02-2018, 04:56 PM
Replies: 25
Views: 735
Posted By Tom M'Guinn

If the klr hose is disconnected or bad, the gauge...

If the klr hose is disconnected or bad, the gauge would read 1 with the ignition on, and sit dead with the ignition off -- so that's not likely your problem. Either the gauge/cluster is bad, or it...
10-01-2018, 06:40 PM
Replies: 31
Views: 849
Posted By Tom M'Guinn

Do you have multiple maps on your m tune set up? ...

Do you have multiple maps on your m tune set up? I know with my Vitesse chipboard, I have the choice between pump gas, race gas, e85, more timing/fuel, less, etc. One of my E85 maps, for example,...
10-01-2018, 06:37 PM
Replies: 25
Views: 735
Posted By Tom M'Guinn

There's no truth to the last statement. You...

There's no truth to the last statement. You would have much less power, but the car would likely start and drive just fine, albeit without any boost, if the turbo was bad. As for whether you'd know...
10-01-2018, 03:06 PM
Replies: 25
Views: 735
Posted By Tom M'Guinn

Ah sorry. Maybe start by checking to confirm...

Ah sorry. Maybe start by checking to confirm that the bright red square 4-wire connector in the right passenger footwell is plugged in (it's behind the carpet and floorboard toward the console...
10-01-2018, 01:13 PM
Replies: 25
Views: 735
Posted By Tom M'Guinn

Read the theory of operation in this thread,...

Read the theory of operation in this thread, which should give you a start on troubleshooting:
...
09-25-2018, 03:19 PM
Replies: 14
Views: 1,793
Posted By Tom M'Guinn

Oops, wrong log in...

Oops, wrong log in...
Showing results 1 to 25 of 492
 


 
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