Just tested my MPS and the result was..., This is getting good... maybe we can all learn something |
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Just tested my MPS and the result was..., This is getting good... maybe we can all learn something |
customstarr |
Jun 18 2007, 05:07 PM
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#1
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King of the Nighttime World Group: Members Posts: 116 Joined: 13-February 07 From: Waterford, Michigan - Home of Waterford Hills Road Racing Member No.: 7,531 |
Good!!! Go figure!?!
I've been chasing this rich condition for a while, and I was betting that the MPS was toast. I measured today with a vacuum pump. Evacuated to 20 Hg - did not drop below 15 Hg within 5 Minutes (tested according to Paul B. Anders D-Jet site specs) only dropped to 18 Hg during that test. Also evacuated to 15 Hg and it held for 5 minutes, only dropping 1 Hg (based on spec found here on this forum). AA's site says that it should hold 15 Hg indefintely. I have to assume that mine is good from a vacuum standpoint. Can I get a second opinion on that so I can be positive? I also tested the MPS coils according to Paul B. Anders D-jet site specs. I was nearly right on the money ohm wise. All said, I have to assume that it is time to move on to the Fuel Pressure - I'll measure that tomorrow. In a strange way, I was kinda hoping it was the MPS. I am soooooo ready to be over this rich mixture issue. Soooooo ready. |
customstarr |
Jun 18 2007, 05:27 PM
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#2
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King of the Nighttime World Group: Members Posts: 116 Joined: 13-February 07 From: Waterford, Michigan - Home of Waterford Hills Road Racing Member No.: 7,531 |
Ok... maybe I spoke to soon. I started to look closely at the part number.
My part numbers are as follows: Bosch: 0 280 100 019 VW: 022 906 051 A B. Anders site says it should be: Bosch P/N: 0 280 100 049 VW P/N: 022 906 051 E (For 1970-1973 1.7L) Funny thing is, his site makes no mention of either of my part numbers. In addition, I google my part numbers and found absolutely nothing for either (in all combinations of spacing). There was a used MPS for an early (1970-1972) 1.7 that recently sold on eBay - seller listed the "correct" P/Ns: 022 906 051 E and 0 280 100 049 - I guess mine is completely wrong based on my investigations. Does anybody know what MPS belongs to? I know that they need to match with the ECU, and I am assuming that mine doesn't. WHAT A BITCH!!! This is getting ridiculous! I'm ready to go off!!! (IMG:style_emoticons/default/ar15.gif) |
dr914@autoatlanta.com |
Jun 18 2007, 05:30 PM
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#3
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914 Guru Group: Members Posts: 8,055 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
Good!!! Go figure!?! I've been chasing this rich condition for a while, and I was betting that the MPS was toast. I measured today with a vacuum pump. Evacuated to 20 Hg - did not drop below 15 Hg within 5 Minutes (tested according to Paul B. Anders D-Jet site specs) only dropped to 18 Hg during that test. Also evacuated to 15 Hg and it held for 5 minutes, only dropping 1 Hg (based on spec found here on this forum). AA's site says that it should hold 15 Hg indefintely. I have to assume that mine is good from a vacuum standpoint. Can I get a second opinion on that so I can be positive? I also tested the MPS coils according to Paul B. Anders D-jet site specs. I was nearly right on the money ohm wise. All said, I have to assume that it is time to move on to the Fuel Pressure - I'll measure that tomorrow. In a strange way, I was kinda hoping it was the MPS. I am soooooo ready to be over this rich mixture issue. Soooooo ready. the pressure sensor should hold yes but the fact that it holds 15 for awhile would not make for a rich rich condition that one could not stand. The fact that it is leaking means definitely that it is on the way out, but I would check first low compression on one cylinder, fuel pressure, and injector spray pattern, and injector color (yellow plug-in ones) Also make sure that someone has not fooled with the sensor causing misadjustment. Many think that by adjusting the sensor they will make it better!!! |
dr914@autoatlanta.com |
Jun 18 2007, 05:33 PM
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#4
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914 Guru Group: Members Posts: 8,055 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
pn is correct for the early cars just been superceded to the 049 don't fret.
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customstarr |
Jun 18 2007, 05:38 PM
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#5
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King of the Nighttime World Group: Members Posts: 116 Joined: 13-February 07 From: Waterford, Michigan - Home of Waterford Hills Road Racing Member No.: 7,531 |
pn is correct for the early cars just been superceded to the 049 don't fret. Thanks George... I was sweating it. It seems to be holding good enough to do it's job in my opinion. The epoxy or screw has not been touched, but I did notice that the unit is held together with screws versus rivets. They look stock - did this vintage have rivets or screws? I wonder if it has been rebuilt at some point. It sure doesn't look like it. |
Cap'n Krusty |
Jun 18 2007, 06:29 PM
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#6
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
Some had machine screws, some rivets. One of the things we learned at P-car school was to split the ones with screws and put a light coat of grease on the o-ring. It helped the seal. The Cap'n
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