#1 cylinder misfiring at idle,
pulling #1 wire makes no difference, so it's a steady miss.
It fires and runs drives normally with slightly higher RPMs.
The only cure I have found is weird,
I pulled the vacuum line (and plugged it) from the TVSV port K
the second from the bottom on the TVSV,
the vacuum source of this line comes from the gas filter,
which happens to be on CYLINDER ONE manifold arm.
Cylinder #1 restored to normal operation and smooth idle.
I have kept this vacuum line from the gas filter plugged for years now.
I've changed plugs, wires and the dist. cap... no help.
Hard to believe there's enough vacuum loss through the gas filter.
Cylinder One Missing at idle
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mrdance123
- Top Notch Member
- Posts: 153
- Joined: Sat Feb 21, 2015 9:03 pm
- My tercel:: 84 and 85 4wd wagons
Cylinder One Missing at idle
85 T4 Speedy Blue, SR5, 270-312k, operational R12 A/C, in use.
84 T4 Curmudgeon Copper, 188-294k, my first T4 in 1990, now Dad's daily driver.
RIP - 84 T4 Foxy Blue, 256-288k, engine died 2021, sold to PNP
Sold: 86 T2 Silver, VIN ending 5847, 194k, cherry condition, now in a good home.
RIP - 83 T4 Smokin' Gold, 270k, rusted out body, parted & scrapped
RIP - 84 T4 Quicksilver SR5, 125k, blown engine no oil, had sat 10+ years, parted & scrapped.
RIP - 80 Corolla (purchased new), 0-473k, 358k original engine, rear-ended totaled in 2003.
84 T4 Curmudgeon Copper, 188-294k, my first T4 in 1990, now Dad's daily driver.
RIP - 84 T4 Foxy Blue, 256-288k, engine died 2021, sold to PNP
Sold: 86 T2 Silver, VIN ending 5847, 194k, cherry condition, now in a good home.
RIP - 83 T4 Smokin' Gold, 270k, rusted out body, parted & scrapped
RIP - 84 T4 Quicksilver SR5, 125k, blown engine no oil, had sat 10+ years, parted & scrapped.
RIP - 80 Corolla (purchased new), 0-473k, 358k original engine, rear-ended totaled in 2003.
-
xirdneh
- Highest Ranking Member
- Posts: 2124
- Joined: Thu Aug 04, 2005 11:38 am
- My tercel:: 87 tercel 4x4 wagon w/reringed engine, 83 tercel 4x4 wagon w/salvaged engine and 4.1 Diff's
- Location: seabeck, washington, USA
Re: Cylinder One Missing at idle
Maybe the tvsv is bad. Test per FSM
Love those Tercell 4x4 wagons but they sure suffer from road noise.
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mrdance123
- Top Notch Member
- Posts: 153
- Joined: Sat Feb 21, 2015 9:03 pm
- My tercel:: 84 and 85 4wd wagons
Re: Cylinder One Missing at idle
I used to have a bad TVSV, but putting in good one did not help the cylinder#1 idle miss.
Don't see that it runs any better, overall, with the working unit.
I've done the cool and hot tests, the replacement TVSV is fine on those.
The air flow changed in various ports as expected by the book.
Out of 6 wrecking yard TVSV's I have pulled, only 1 was good
Don't see that it runs any better, overall, with the working unit.
I've done the cool and hot tests, the replacement TVSV is fine on those.
The air flow changed in various ports as expected by the book.
Out of 6 wrecking yard TVSV's I have pulled, only 1 was good
85 T4 Speedy Blue, SR5, 270-312k, operational R12 A/C, in use.
84 T4 Curmudgeon Copper, 188-294k, my first T4 in 1990, now Dad's daily driver.
RIP - 84 T4 Foxy Blue, 256-288k, engine died 2021, sold to PNP
Sold: 86 T2 Silver, VIN ending 5847, 194k, cherry condition, now in a good home.
RIP - 83 T4 Smokin' Gold, 270k, rusted out body, parted & scrapped
RIP - 84 T4 Quicksilver SR5, 125k, blown engine no oil, had sat 10+ years, parted & scrapped.
RIP - 80 Corolla (purchased new), 0-473k, 358k original engine, rear-ended totaled in 2003.
84 T4 Curmudgeon Copper, 188-294k, my first T4 in 1990, now Dad's daily driver.
RIP - 84 T4 Foxy Blue, 256-288k, engine died 2021, sold to PNP
Sold: 86 T2 Silver, VIN ending 5847, 194k, cherry condition, now in a good home.
RIP - 83 T4 Smokin' Gold, 270k, rusted out body, parted & scrapped
RIP - 84 T4 Quicksilver SR5, 125k, blown engine no oil, had sat 10+ years, parted & scrapped.
RIP - 80 Corolla (purchased new), 0-473k, 358k original engine, rear-ended totaled in 2003.
-
xirdneh
- Highest Ranking Member
- Posts: 2124
- Joined: Thu Aug 04, 2005 11:38 am
- My tercel:: 87 tercel 4x4 wagon w/reringed engine, 83 tercel 4x4 wagon w/salvaged engine and 4.1 Diff's
- Location: seabeck, washington, USA
Re: Cylinder One Missing at idle
They can be fixed.
You do have an odd situation
Sure would like to know what is going on, if you ever solve it
You do have an odd situation
Sure would like to know what is going on, if you ever solve it
Love those Tercell 4x4 wagons but they sure suffer from road noise.
Re: Cylinder One Missing at idle
Have you checked the AAP diaph? If ruptured, raw fuel is dumped into #1 intake runner by way of the TVSV and gas filter. Easy to check, just disconnect and plug the vac. line to the AAP. Bet it cures your problem.
if it aint there, there's a good chance it won't break!
83 SR5 Silver/Blue (Snowmobile/work beater)-totaled but drivable
85 SR5 Blue
88 SR5 White (the 'good' one)-not anymore-totaled
87 fwd silver wagon a/t
87 4wd dx Cream (a/t- not anymore- now m/t)
83 SR5 Silver/Blue (Snowmobile/work beater)-totaled but drivable
85 SR5 Blue
88 SR5 White (the 'good' one)-not anymore-totaled
87 fwd silver wagon a/t
87 4wd dx Cream (a/t- not anymore- now m/t)
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mrdance123
- Top Notch Member
- Posts: 153
- Joined: Sat Feb 21, 2015 9:03 pm
- My tercel:: 84 and 85 4wd wagons
Re: Cylinder One Missing at idle
I bet you're right, rer233, thanks!
The extra fuel would be just enough to flood #1 cylinder, and only at idle.
Next time I visit Dad, I'll check it out, he has the car.
Will update with results.
Looking at the diagram,
I was wondering if check valve from TVSV to EGR could be ruptured,
but your suggestion makes more sense to me.
The extra fuel would be just enough to flood #1 cylinder, and only at idle.
Next time I visit Dad, I'll check it out, he has the car.
Will update with results.
Looking at the diagram,
I was wondering if check valve from TVSV to EGR could be ruptured,
but your suggestion makes more sense to me.
85 T4 Speedy Blue, SR5, 270-312k, operational R12 A/C, in use.
84 T4 Curmudgeon Copper, 188-294k, my first T4 in 1990, now Dad's daily driver.
RIP - 84 T4 Foxy Blue, 256-288k, engine died 2021, sold to PNP
Sold: 86 T2 Silver, VIN ending 5847, 194k, cherry condition, now in a good home.
RIP - 83 T4 Smokin' Gold, 270k, rusted out body, parted & scrapped
RIP - 84 T4 Quicksilver SR5, 125k, blown engine no oil, had sat 10+ years, parted & scrapped.
RIP - 80 Corolla (purchased new), 0-473k, 358k original engine, rear-ended totaled in 2003.
84 T4 Curmudgeon Copper, 188-294k, my first T4 in 1990, now Dad's daily driver.
RIP - 84 T4 Foxy Blue, 256-288k, engine died 2021, sold to PNP
Sold: 86 T2 Silver, VIN ending 5847, 194k, cherry condition, now in a good home.
RIP - 83 T4 Smokin' Gold, 270k, rusted out body, parted & scrapped
RIP - 84 T4 Quicksilver SR5, 125k, blown engine no oil, had sat 10+ years, parted & scrapped.
RIP - 80 Corolla (purchased new), 0-473k, 358k original engine, rear-ended totaled in 2003.