IPD sale Volvo Parts

Sluggish off the line and worse in hot weather

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.
1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70
Post Reply
shadetree_v70
Posts: 55
Joined: Mon Nov 02, 2009 1:08 pm
Year and Model: 1998 V70 GLT
Location: Charleston, SC
United States of America

Sluggish off the line and worse in hot weather

Post by shadetree_v70 » Thu Jul 12, 2018 7:54 pm

Can’t figure out what’s going on. Starts and idles just fine. Drives and shifts fine. But there’s just no real power until about 3000rpm.

A while back I posted my saga of lower engine noise, and decided to swap in a lower mileage motor instead of trying to rebuild. Got it all back together and drove great. Except that stupid me forgot to install the front pump seal in the tranny, which leaked like a sieve on the test drive. After 332000 miles how else would it be? So I replaced that seal, buttoned it all up again and on first drive noticed significantly less power. Seemed like lack of boost. No smoke, noise, leaks, just no low end power. I have tracked down every vacuum line swapped in a space TCV I had, swapped in a newer CBV diaphragm, can’t figure it out. The car is driveable but slow off the line. Gets worse in the heat (it’s been mid 90s lately). I’m starting to think something electrical? I’m tempted to swap turbos? But the damn thing ran just fine as it sits before I changed that tranny seal so I feel like I didn’t hook something up correctly and hoping to get some fresh ideas to get this resolved. Thanks!



User avatar
mrbrian200
Posts: 1231
Joined: Wed Jan 20, 2016 8:47 am
Year and Model: 2006 S60 2.5T FWD
Location: Northern Indiana/Chicago
Has thanked: 3 times
Been thanked: 45 times
United States of America

Re: Sluggish off the line and worse in hot weather

Post by mrbrian200 » Fri Jul 13, 2018 11:32 am

I doubt it's electrical. Beyond that it's difficult to speculate considering you've dropped the trans twice.
If there are no OBD/DTC trouble codes or CEL lit, my best guess would be an issue with the torque converter.
However, even with that I would expect the TCM should be picking up on the discrepancy between the input and output shaft speeds and trigger the CEL and limp mode.

Are you certain the shift select cable is attached/adjusted properly? ie. the dash indicator may say it's in "D" but the trans is actually running in "3"? I'm not sure if that's even possible...just a thought.

'light power' until pushing a higher RPM sounds like my car if I put it in 'Wet/Winter' mode where I believe the trans starts out in 2nd gear instead of 1st.

Edit: you ran it with a badly damaged or missing pump seal. Might there be a first fill procedure that might need to be executed to purge air from the internals/valve body/servos?



shadetree_v70
Posts: 55
Joined: Mon Nov 02, 2009 1:08 pm
Year and Model: 1998 V70 GLT
Location: Charleston, SC
United States of America

Re: Sluggish off the line and worse in hot weather

Post by shadetree_v70 » Fri Jul 13, 2018 1:14 pm

The only "electrical" i could think of is underpowering the coil or something like that but I realize that's a reach. It was running fine before trans drop #2.

I will check the shift cable. I was very careful to mark exactly where the bracket was bolted but I hadn't thought of that thanks.

Much like a fresh coolant fill, there was a bit of check/top off/check/top off process. I was surprised how much i had to add after the first test drive around the block. It's full now and not leaking, so at least I have that :)

The CEL is on intermittently but that stems from the air pump. It used to be on all the time, with the new motor sometimes it doesn't light at all. No different codes present.



User avatar
wizechatmgr
Posts: 941
Joined: Thu Jan 12, 2017 1:07 pm
Year and Model: 1999 V70 XC AWD 2.4T
Location: Albany, NY area
Has thanked: 13 times
Been thanked: 24 times
Contact:
United States of America

Re: Sluggish off the line and worse in hot weather

Post by wizechatmgr » Fri Jul 13, 2018 10:25 pm

When my MAF was dirty, I had the same kind of lethargic response.


Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD - ~163k miles

jsloden
Posts: 46
Joined: Wed Dec 27, 2017 11:20 am
Year and Model: 1998 C70 coupe
Location: Mississippi
Has thanked: 1 time
United States of America

Re: Sluggish off the line and worse in hot weather

Post by jsloden » Sat Jul 14, 2018 12:38 pm

This is probably not it since you said it started when you swapped the engines but when I first purchased my c70 it was much more sluggish then I knew it should be. I did a drain and fill on the transmission and realized that it was about two quarts low. filled it up to proper level with new fluid and the car picked up significantly. The trans wasn't slipping or anything, just really sluggish. May want to at least check the level.



User avatar
sleddriver
Posts: 975
Joined: Thu Apr 08, 2010 6:06 pm
Year and Model: 1998 V70 T5
Location: Tx
Has thanked: 11 times
Been thanked: 6 times
United States of America

Re: Sluggish off the line and worse in hot weather

Post by sleddriver » Sun Jul 15, 2018 7:40 pm

1. Be sure your timing belt marks are spot on. Mine was 'detuned' for nearly 6yrs when indy mis-installed it 2 teeth off and turned it into a dog. Tooks years to make the connection.

2. If it's very hot there, you need premium gas (93) otherwise the ECU will retard the ignition enough to dump most boost and turn it into a dog.

3. Ensure your wastegate is properly set. Again, mine was severely off for about 14yrs before I ever thought to check it. In a turbo car, that's just nuts.

4. Smoke the motor looking for vacuum leaks.


1998 V70 T5 226,808 miles. Original Owner.
M1 10W-30 HM

User avatar
abscate
MVS Moderator
Posts: 14223
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 1999 V70T5, 2005 V70
Location: NYC
Has thanked: 60 times
Been thanked: 236 times
Trinidad & Tobago

Re: Sluggish off the line and worse in hot weather

Post by abscate » Mon Jul 16, 2018 3:28 am

I crossed up my turbo vacuum lines on the T5 and drove it like that for about a year. Never quite understood what happened as my vacuum pull off for the Compressor pull off wouldn’t reach from manifold to valve, had to buy new hose.

I’m a light footed driver so I didn’t notice performance loss. Someday, someone will buy my T5 that has had the little old lady’s life.


1 SWMBO for 30 years
2 Volvos
3 VWs
4 Careers
5 cats/dogs/gears
6 Perfect Ladies in waiting
7 Drivers
8 Boats- with a big pointy metal thing on top

1999 V70 T5M 56 2005 V70 NA M56 VWs BMW

shadetree_v70
Posts: 55
Joined: Mon Nov 02, 2009 1:08 pm
Year and Model: 1998 V70 GLT
Location: Charleston, SC
United States of America

Re: Sluggish off the line and worse in hot weather

Post by shadetree_v70 » Mon Jul 16, 2018 6:36 am

sleddriver wrote:
Sun Jul 15, 2018 7:40 pm
1. Be sure your timing belt marks are spot on. Mine was 'detuned' for nearly 6yrs when indy mis-installed it 2 teeth off and turned it into a dog. Tooks years to make the connection.

Done. Before I set the new motor in place I notice they weren't spot on. They are now


2. If it's very hot there, you need premium gas (93) otherwise the ECU will retard the ignition enough to dump most boost and turn it into a dog.

It's never been an issue before but good thought to keep in mind. I always thought turbo motors typically run lower compression and don't detonate as easily as n/a motors.

3. Ensure your wastegate is properly set. Again, mine was severely off for about 14yrs before I ever thought to check it. In a turbo car, that's just nuts.
Will double check




User avatar
sleddriver
Posts: 975
Joined: Thu Apr 08, 2010 6:06 pm
Year and Model: 1998 V70 T5
Location: Tx
Has thanked: 11 times
Been thanked: 6 times
United States of America

Re: Sluggish off the line and worse in hot weather

Post by sleddriver » Fri Jul 20, 2018 3:42 pm

Perhaps you pinched a seal or vacuum hose or connector didn't fully seat, causing a vacuum leak. I recall RSPI warning people about intake manifold gasket leaks and the havoc they wreck.

Save time, frustration and your hair by smoking it.


1998 V70 T5 226,808 miles. Original Owner.
M1 10W-30 HM

Post Reply

Who is online

Users browsing this forum: Duckpa, ecbsykes, j-dawg and 49 guests