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1995 850 GLT poor running, bad Bremi off brand MAF Topic is solved

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erikv11
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Post by erikv11 »

vovo850 wrote: 17 Nov 2018, 14:49 ... Well wish me some good wrenching, I'm about to remove tensioner and start over.
Good wrenching!
'95 854 T-5R, Motronic 4.4, 185k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 201k
'07 XC70, black, 205k
'07 XC70, willow green, 223k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k

vovo850
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Post by vovo850 »

Thanks again for the help on the timing, I believe it is good now, runs like it use to, good power it appears.
Couldn't test it out too much because it still isn't 100%
I do believe the MAF is going bad. It idled fine for a long time so took it down the road
went to turn around and it started acting up.
Cleared up and got her home.
Idled in the driveway for a good 20 minutes and than started acting up again.
Unplugged the MAF when it was choking and it kicked the idle up stayed running but roughly the same,
plugging it back in while it was running rough would sometimes result in a smoother idle
and sometimes no change. Safe guess the MAF is the culprit
It isn't a bosch as I mentioned in my 1st post but it lasted several years. So I can't complain much.
When times are tight what can you do, I tried a ebay bosch one prior and it lasted 30 days maybe.
Fortunately I have the cash to buy bosch this time.
If you guys think it might be something else feel free to add.
1995 Volvo 850 GLT N/A automatic wagon

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abscate
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Post by abscate »

The changes you see plugging/ unplugging the MAF are complex but aren’t good diagnostics for the MAF. Most poor runn8ng is worn ignition parts and vacuum leaks...spend money there first if you want to keep spend low.
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vovo850
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Post by vovo850 »

Wouldn't those issues cause constant poor running and not intermittent?
If it's a bad vacuum, wouldn't it be a constant? Same with ignition parts?
My assumption could be wrong but I figured a flaky MAF is the issue, I've experienced this before with a bad MAF.
I guess that is why I assume that is the issue. plus the code it threw was for MAF.
I'm not ruling out what you are saying. I guess ignition issues could be flaky as well.
1995 Volvo 850 GLT N/A automatic wagon

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Post by abscate »

These cars have complex , interconnected control systems that can withstand a lot of worn parts and still run pretty well

I had a ripped open vacuum hose on my purge circuit that gave me a rough cold idle, otherwise a perfectly good running car, for example. MAFS rarely go bad, about 4/5 MAF replacements here with field Diagnoses aren’t productive
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Post by erikv11 »

Bad MAF is a good bet, especially given what you said in first post. Unplug it with the car off, drive it around. If that cures it, get a Bosch MAF. If not, you're going to need a Bosch MAF soon anyway. Not a good idea to pul/unplug while it is running.

These are cars are tolerant yes, but not of non-Bosch MAF.
'95 854 T-5R, Motronic 4.4, 185k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 201k
'07 XC70, black, 205k
'07 XC70, willow green, 223k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k

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Post by bmdubya1198 »

Have you checked the diagnostic connector for flash codes?
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03 S60 2.4T
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Post by vovo850 »

bmdubya1198 wrote: 18 Nov 2018, 16:52 Have you checked the diagnostic connector for flash codes?
vovo850 wrote: 18 Nov 2018, 13:54 plus the code it threw was for MAF.
You can also read the codes I retrieved on my first post.
1995 Volvo 850 GLT N/A automatic wagon

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Post by bmdubya1198 »

vovo850 wrote: 18 Nov 2018, 17:05
bmdubya1198 wrote: 18 Nov 2018, 16:52 Have you checked the diagnostic connector for flash codes?
vovo850 wrote: 18 Nov 2018, 13:54 plus the code it threw was for MAF.
You can also read the codes I retrieved on my first post.
Gotcha. I would try swapping in a known good Bosch MAF.
07 XC90 V8 AWD Sport Titanium Grey/Black 235k
92 245 White/Beige 249k
91 944 Turbo 175k
…and a bunch of other stuff
Sold-
00 V70R Venetian Red/Charcoal M56 Swapped
03 S60 2.4T
00 S70 GLT
98 V70 GLT
93 944
98 S90
95 850 GLT
01 S60 2.4T
05 S60R M66
08 S40 2.4i
88 744 Turbo M46

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Post by vovo850 »

Got the new Bosch installed and it's idling right now so far so good.
I'll take it for a spin in a bit and update.
The one I took out was a bremi,(appears it has a date code of 2014 on it)
it lasted for a while so can't complain much.
It didn't look dirty but than I just pulled out an old bosch I replaced with the bremi it looked clean too.
It's been too long now so I may have tried cleaning it, can't recall now.
UPDATE: took it down the road, and it feels like it use to, nice acceleration, no hiccups, hesitation or anything so far.
Thanks everyone for the insight and help on this.
So weird to lose the MAF right after the timing belt change. But that's how it goes sometimes...
1995 Volvo 850 GLT N/A automatic wagon

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