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aerosurfer
Samba Member
Joined: March 25, 2012
Posts: 1602
Location: Indianapolis, IN
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 Posted: Thu Mar 16, 2017 12:34 pm Post subject: T4 FI motor doesn't want to accelerate in gear |
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Haven't driven much in the last month, but have had no odd symptoms until last week. Adjusted my clutch as I thought in had too much play, then went for a drive. Had some hydro lifter noise that's to be expected and it started right up and idles just fine. But when I left my house it doesn't want to accelerate past about 3000rpm while in gear (first and second). Drove home and put it away until today. Adjusted the clutch back out to give it a little more free play and went for another drive. Same thing.
Motor is a stock 2.0 FI with hydro lifters.
Steady idle
14-14.7 afr
Good oil pressure and quantity with 15w40 rotella
Idle timing is good, spark at each cylinder
Vacuum was down from normal. 13psi-ish
It will rev up in neutral just fine
I guess my next check will be to check plugs and valves.
Link
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Last edited by aerosurfer on Thu Mar 16, 2017 12:57 pm; edited 1 time in total |
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Cap10323
Samba Member
Joined: July 24, 2016
Posts: 604
Location: Ohio
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| Posted: Thu Mar 16, 2017 12:53 pm Post subject: Re: T4 FI motor doesn't want to accelerate in gear |
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| aerosurfer wrote: |
Haven't driven much in the last month, but have had no odd symptoms until last week. Adjusted my clutch as I thought in had too much play, then went for a drive. Had some hydro lifter noise that's to be expected and it started right up and idles just fine. But when I left my house it doesn't want to accelerate past about 3000rpm while in gear (first and second). Drove home and put it away until today. Adjusted the clutch back out to give it a little more free play and went for another drive. Same thing.
Motor is a stock 2.0 FI with hydro lifters.
Steady idle
14-14.7 afr
Good oil pressure and quantity with 15w40 rotella
Idle timing is good, spark at each cylinder
Vacuum was down from normal. 13psi-ish
I guess my next check will be to check plugs and valves. |
Fuel contaminated with water? Weak fuel pump from sitting?
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'77 Westfalia - 2.0 F.I |
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aerosurfer
Samba Member
Joined: March 25, 2012
Posts: 1602
Location: Indianapolis, IN
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| Posted: Thu Mar 16, 2017 12:58 pm Post subject: Re: T4 FI motor doesn't want to accelerate in gear |
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Perhaps in some form, but its stored inside
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Rebuild your own FI Harness..My Harness
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TomWesty
Samba Member
Joined: November 23, 2007
Posts: 3482
Location: Wyoming,USA
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| Posted: Thu Mar 16, 2017 5:38 pm Post subject: Re: T4 FI motor doesn't want to accelerate in gear |
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Are those AFr numbers what you have while the condition is occurring?
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aerosurfer
Samba Member
Joined: March 25, 2012
Posts: 1602
Location: Indianapolis, IN
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| Posted: Thu Mar 16, 2017 6:01 pm Post subject: Re: T4 FI motor doesn't want to accelerate in gear |
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| TomWesty wrote: |
| Are those AFr numbers what you have while the condition is occurring? |
That's are my standing idle number. Jsut to know its not a Vac leak while sitting/warmed up. They are lower when under load. Good point, didn't notice what is was when it bogged down. ARG.... guess I'll have to put my car through more painful testing this weekend. Thanks
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Rebuild your own FI Harness..My Harness
77 Westy 2.0L Rockin and Rolling Resto!
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79 Tran$porter... Parts car money machine (gone) |
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aeromech
Samba Member
Joined: January 24, 2006
Posts: 16971
Location: San Diego, California
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| Posted: Thu Mar 16, 2017 6:15 pm Post subject: Re: T4 FI motor doesn't want to accelerate in gear |
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Nick,
Did your lifter ever pump up and stop making noise? I've seen a Vanagon that clattered for 30 minutes or more. You can't expect full power with flat lifters
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TDCTDI
Samba Advocatus Diaboli
Joined: August 31, 2013
Posts: 12858
Location: North Carolina
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| Posted: Thu Mar 16, 2017 6:31 pm Post subject: Re: T4 FI motor doesn't want to accelerate in gear |
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Sticking door on air flow meter?
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 50352
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| Posted: Thu Mar 16, 2017 8:54 pm Post subject: Re: T4 FI motor doesn't want to accelerate in gear |
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| Did you check to see if you were getting centrifugal advance or not? |
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Lil Lulu
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Joined: December 08, 2007
Posts: 1745
Location: Mouth of the Columbia
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| Posted: Thu Mar 16, 2017 9:05 pm Post subject: Re: T4 FI motor doesn't want to accelerate in gear |
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I would suspect advance. I have carbs but experienced something similar in the past and the advance was sticking. Funny thing was it would also rev when out of gear but dogged off under load.
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aerosurfer
Samba Member
Joined: March 25, 2012
Posts: 1602
Location: Indianapolis, IN
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| Posted: Fri Mar 17, 2017 6:02 am Post subject: Re: T4 FI motor doesn't want to accelerate in gear |
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The engine didnt run long enough for the lifter to fully pump up, but in any previous experiences with a bled down lifter in my bus, it hasnt effected performance like im experiencing. Ill make sure to get it fully up though.
Ill check the advances and distributor components when i get home this weekend. Ill look into the afr door too but i dont suspect that would be it.
Thanks, ill report back when i can
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77 Westy 2.0L Rockin and Rolling Resto!
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aerosurfer
Samba Member
Joined: March 25, 2012
Posts: 1602
Location: Indianapolis, IN
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| Posted: Fri Mar 24, 2017 5:08 pm Post subject: Re: T4 FI motor doesn't want to accelerate in gear |
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| Lil' Lulu wrote: |
| I would suspect advance. I have carbs but experienced something similar in the past and the advance was sticking. Funny thing was it would also rev when out of gear but dogged off under load. |
I think this nailed it. I lubed the distributor, and double checked all connections everywhere. There was some carbon buildup on my rotor that I filed shinny. Otherwise didn't do anything else.
Tonight I went for a drive, while the lifter noise was still prevalent initially, I had no hesitation issues and engine power was back to normal. By the the time I got done with my gas up and cruise, the lifters are quite again. Gotta love the simple fixes
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77 Westy 2.0L Rockin and Rolling Resto!
72 Sportsmobile (sold)
79 Tran$porter... Parts car money machine (gone) |
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airschooled
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| Posted: Fri Mar 24, 2017 10:56 pm Post subject: Re: T4 FI motor doesn't want to accelerate in gear |
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Nice. Thanks for posting the solution, as it helps future searching.
Robbie
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