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P0305 Code (misfire code) Topic is solved

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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rspi
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Re: P0305 Code (misfire code)

Post by rspi »

A good tune up, new cam sensor, etc. on that car should go a long way. Two months car payment isn't to bad.

Glad it ended well.
'95 855 T-5R M, Panther - 22/28 mpg, 546,000 miles
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
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songzunhuang
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Post by songzunhuang »

abscate wrote:Robert gets the Spinner Cup for this one....
3. Double and triple check for intake manifold leak
I should have advised you to use spray to test for idle fluctuation, well done by the dealer. They earned their money on this one
Just for completeness, I took my car to a independent shop in Santa Cruz, CA called A & E Motorsports. The owner (Jeremy) is a Volvo guy and drives a V70 while his wife drives an XC90. I found him on Yelp and his shop had a 5 star review after 6 years of business! You almost never see a perfect 5 star review. So, I decided to take the car here instead of the Volvo dealer, which is a 35 minutes drive away from me.

In the end, I am glad I did it.

Yes, Robert gets the award! Although I did visually check the manifold and the torque of the bolts, there were areas that a visual from above just could not spot. I have never in my life had a gasket fail on any of the cars I have owned. I didn't even think to look for that. I was looking for cracked or worn rubber hoses and such.
Last edited by songzunhuang on 12 May 2016, 08:58, edited 1 time in total.
Song Huang

1998 V70 T5 - Hurt your eyes red
2000 Honda S2000 - Berlina Black
1984 BMW 633CSi - Dolphin Grey
2024 Lexus - Eminent White Pearl
2004 XC90 T6 AWD Ruby red (RIP)

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Post by songzunhuang »

rspi wrote:A good tune up, new cam sensor, etc. on that car should go a long way. Two months car payment isn't to bad.

Glad it ended well.
Car payment? What's that? LOL.
My wife and I have a rule. If we can't pay for the car in cash, we can't afford it. Of course this has limited the amount we will pay for a car. This V70 in question was purchased new in 1998 for $36,000. It was the 2nd most expensive car we have ever purchased. The first was a Lexus LS400.

In any case, the car has served us extremely well. My daughter was brought home from the hospital after her birth in this car. Now, it's her first car after getting her license. So you see, this car has nostalgic value. As long as it makes fiscal sense - and maybe when it doesn't - we will keep this car going. It's got 248K miles now and is still in excellent shape. ... now that it runs right.
Sitting pretty in it's rightful spot. This car will go over 300K miles. I will see to that.
Sitting pretty in it's rightful spot. This car will go over 300K miles. I will see to that.
Thanks to all on this forum for helping.
Song Huang

1998 V70 T5 - Hurt your eyes red
2000 Honda S2000 - Berlina Black
1984 BMW 633CSi - Dolphin Grey
2024 Lexus - Eminent White Pearl
2004 XC90 T6 AWD Ruby red (RIP)

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erikv11
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Post by erikv11 »

Ahem, Spinner cup honorable mention maybe? The post right after Robert's was ...
erikv11 wrote:Starting fluid is supposed to be really good for finding/testing for intake manifold leaks. I haven't used it but have read about it many times. It is really acting like a vacuum leak (except for only giving codes for #5).
'95 854 T-5R, Motronic 4.4, 185k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 197k
'07 XC70, black, 205k
'07 XC70, willow green, 212k
'99 Camry V6 :shock: 153k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k

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Post by songzunhuang »

erikv11 wrote:Ahem, Spinner cup honorable mention maybe? The post right after Robert's was ...
erikv11 wrote:Starting fluid is supposed to be really good for finding/testing for intake manifold leaks. I haven't used it but have read about it many times. It is really acting like a vacuum leak (except for only giving codes for #5).
Oh, big props to you too!
I was looking for major items when I should of focused on the smaller details. Lesson learned. Thanks.
Song Huang

1998 V70 T5 - Hurt your eyes red
2000 Honda S2000 - Berlina Black
1984 BMW 633CSi - Dolphin Grey
2024 Lexus - Eminent White Pearl
2004 XC90 T6 AWD Ruby red (RIP)

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Post by erikv11 »

No big props are in order, just wanted to point out the info is sometimes in these long threads, we just have to dig for it. Long thread makes it tough to keep up with the details! Really its just just good to know you got the T5 back on the road, and like Robert says it should run cleaner smoother longer now.
'95 854 T-5R, Motronic 4.4, 185k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 197k
'07 XC70, black, 205k
'07 XC70, willow green, 212k
'99 Camry V6 :shock: 153k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k

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Post by abscate »

erikv11 wrote:Ahem, Spinner cup honorable mention maybe? The post right after Robert's was ...
erikv11 wrote:Starting fluid is supposed to be really good for finding/testing for intake manifold leaks. I haven't used it but have read about it many times. It is really acting like a vacuum leak (except for only giving codes for #5).
I'll award the Spinner Saucer to you for point grubbing

Well done everyone. 8 pages of thread to keep a nostalgic one alive.

My own 1999 was the toddler afternoon sleep mobile and it either goes to Smith College next fall :D or goes into the classifieds :(
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Post by sleddriver »

songzunhuang wrote:Well the verdict is in. The intake manifold gasket failed on #5 and was on it's way to failing on #1. This is disturbing as there was nothing wrong with the bolt torque. A stupid $15 part caused all this issue. I changed the gasket when I changed the PCV system back in August of last year. So the intake manifold gasket only lasted 9 months.
Odd that. How does an intake gasket fail over time? There are no fluids from above to contaminate it. No pressure on it either (OK, a little). It would definitely get hot, no doubt. I wonder if it was dinged or kinked or folded on installation?

Smoke would have found this. So would have spray (in time). Interesting. I like their technique of checking fuel trim at idle. It wouldn't necessarily tell you WHERE it is, but could infer how bad it is. Very educational post for me as I was going through an irregular Cyl #2 misfire diagnosis myself.

Glad you got it solved Song! Your are indeed fortunate to have such a dedicated VOLVO expert so close! A true treasure!
1998 V70 T5 226,808 miles. Original Owner.
M1 10W-30 HM

beigg
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Post by beigg »

songzunhuang wrote:
abscate wrote:Robert gets the Spinner Cup for this one....
3. Double and triple check for intake manifold leak
I should have advised you to use spray to test for idle fluctuation, well done by the dealer. They earned their money on this one
Just for completeness, I took my car to a independent shop in Santa Cruz, CA called A & E Motorsports. The owner (Jeremy) is a Volvo guy and drives a V70 while his wife drives an XC90. I found him on Yelp and his shop had a 5 star review after 6 years of business! You almost never see a perfect 5 star review. So, I decided to take the car here instead of the Volvo dealer, which is a 35 minutes drive away from me.

In the end, I am glad I did it.

Yes, Robert gets the award! Although I did visually check the manifold and the torque of the bolts, there were areas that a visual from above just could not spot. I have never in my life had a gasket fail on any of the cars I have owned. I didn't even think to look for that. I was looking for cracked or worn rubber hoses and such.
How far away (under 10 minutes?) was A & E Motorsports?
ugh smh 850 Turbo fridge

songzunhuang
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Post by songzunhuang »

abscate wrote:
erikv11 wrote:Ahem, Spinner cup honorable mention maybe? The post right after Robert's was ...
erikv11 wrote:Starting fluid is supposed to be really good for finding/testing for intake manifold leaks. I haven't used it but have read about it many times. It is really acting like a vacuum leak (except for only giving codes for #5).
I'll award the Spinner Saucer to you for point grubbing

Well done everyone. 8 pages of thread to keep a nostalgic one alive.

My own 1999 was the toddler afternoon sleep mobile and it either goes to Smith College next fall :D or goes into the classifieds :(
Hey, I visited Smith College with my daughter when she was doing college tours. We also visit Boston College, Mt. Holyoke and Harvard on the same trip. Alas, she chose a west coast college, but still it's a small world.
Song Huang

1998 V70 T5 - Hurt your eyes red
2000 Honda S2000 - Berlina Black
1984 BMW 633CSi - Dolphin Grey
2024 Lexus - Eminent White Pearl
2004 XC90 T6 AWD Ruby red (RIP)

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