Good afternoon folk ;D
Before I start delving into the issue,just testing to see if anyone has had the issue before.
Noticed on way home from shindig, Maureen doesn't like revving anymore, was fine on the way down.
First gear up to around 6k, 2nd gear 5.5k, 3rd 5k and rest cruising around the 4.5k.
Acts as if it's hit the limiter and coughs a little.
This year have had a sports cat installed.
MAF mod.
New air filter swapped like for like cone filter.
All was working fine together before last weekend.
Works fine otherwise and no EML.
Any idea what the fault is indicative of?
Many thanks for any input,
Garfy 🙃
Damn, that's my fault because I said that Maureen looked really lovely with her sparkling new headlights. I must've said something to upset her. ;) Hope you get it sorted Garfy.
I'll set aside my distaste for absurdly-named cars & suggest the crank position sensor.
Bottom of the timing cover, access from underneath, - quite awkward to get a spanner on. It has a wire & the bolt provides the earth connection. It could be corrosion. Mine had become loose...no idea why.
did you fillup with petrol just before you got there or just after you left?
Quote from: Gaz mr-s on August 5, 2020, 17:42I'll set aside my distaste for absurdly-named cars & suggest the crank position sensor.
Bottom of the timing cover, access from underneath, - quite awkward to get a spanner on. It has a wire & the bolt provides the earth connection. It could be corrosion. Mine had become loose...no idea why.
Thanks Gaz, will get that checked today.
I like absurd ;D
Named after a silver cat I adopted and became fond of, I didn't name the cat ::)
Quote from: jonbill on August 5, 2020, 19:07did you fillup with petrol just before you got there or just after you left?
Good call Jonbill, I did fill up at a small Texaco garage on the way back 🤔 still got half a tank left tho.
May need a little unspirted driving today to use it up, then top up with some nice stuff, see if it makes a difference.
Quote from: Gaz mr-s on August 5, 2020, 17:42I'll set aside my distaste for absurdly-named cars & suggest the crank position sensor.
Bottom of the timing cover, access from underneath, - quite awkward to get a spanner on. It has a wire & the bolt provides the earth connection. It could be corrosion. Mine had become loose...no idea why.
Nice one Gaz, it was indeed corroded, taken off and new bolt fitted, earth connection taken back to bare metal all put back together and connected up :D (not by me ::) )
Unfortunately same issue :-\
Could it be the sensor itself?
Any other thoughts on the subject welcome :)
Hmmm.... it was Carolyn's 1st thought too (I learned via her.)
Next to try is the maf....the sensor is hidden up, not the easily visible blob....spray it with carb cleaner or such. If that doesn't work gun it in 2nd gear & describe what it does....your top post is a little vague.
I will take it out again today, see if I can get a video of issue. Also trying to set up torque to log the data. 😁
A simple description should suffice....is it misfiring, how does it rev to sort of thing.
Out in it at the moment, got the video don't know how to upload it 🙄
Seems to be slightly worse today, I'm going to describe 2nd gear as this is where you notice the most.
Accelerates fine to 4500 revs (5.5 the other day) then won't go any further, drops back to 4k, up again then back.
All other gears won't go above 4.5k
Whilst driving, I put the clutch in and floored accelerator, went up to 5k, then dropped down to 4k and bounced on the rev up and down from 4 to about 4.1
Hope that's a bit clearer.
I don't know the answer, but what about car stationery... does it rev to 5k or more then?
On the MK2's the Knock sensor would limit rev's but at alower RPM than your getting to, and it'd throw up an engine light...
Quote from: Gaz mr-s on August 8, 2020, 13:57I don't know the answer, but what about car stationery... does it rev to 5k or more then?
Will drive to a secluded area and check. Don't want to annoy the neighbors 🤣
Someone has suggested adding another earth to the sensor, which should get done next week.
Thanks again everyone for the input
🙃
Could also be the crank position sensor but it's a long shot, bottom of timing chain cover but in the block itself. Similar idea to camshaft sensor.
Really does sound like a blocked cat though to be honest, even though you've smashed the precats heads in.
Quote from: Call the midlife! on August 8, 2020, 17:14Could also be the crank position sensor but it's a long shot, bottom of timing chain cover but in the block itself. Similar idea to camshaft sensor.
Really does sound like a blocked cat though to be honest, even though you've smashed the precats heads in.
Spoke to the mechanic, we're going to drop the cat and give it a blast, see if the problem goes.
Sports cat, brand new, only been on a couple of months.
Could it be possible it's the cat itself?
Morning ☀️ 😁
Quote from: Garfy on August 11, 2020, 06:43Quote from: Call the midlife! on August 8, 2020, 17:14Sports cat, brand new, only been on a couple of months.
Could it be possible it's the cat itself?
Be a simple test IF you had a spare to chuck on.
One of those cheap endoscope could also be handy.
A little further information folk.
Been around a week since I drove her, driven to work this morning as the mechanic is coming out to have a look and it's slightly worse.
Won't now rev above 3.5 - 4k in any gear.
Thinking now, it couldn't be the earth to the crankshaft sensor as that can't get worse in this respect, could it?
Thinking it points more towards the cat being blocked as that could get worse, i.e. more blocked.
Got my old cat in the car to swap back and see how it is then, fingers crossed. 😊
Hi Garfy, Do hope Maureen's problem gets solved relatively cheaply and she'll be back running as she should soon. :'(
I am no expert at all but I dont think it will be the cat, a sports cat has better flow than an oem so no real chance of it causing these symptoms so suddenly.
I have a different engine but I had problems a few years ago and a blocked cat was talked about as a possible problem.
I ended up with a new crank position sensor (the end was all corroded) and the fuel pump filter needing cleaning.
I would suggest just getting a new CPS as cheap
https://www.ebay.co.uk/itm/CrankShaft-Position-Sensor-Pulse-Crank-Shaft-60241-BREMI-for-Toyota/184201615918?fits=Car+Make%3AToyota%7CModel%3AMR+2%7CCars+Type%3A1.8+16V+VT-i%7CPlat_Gen%3AMK+III%7CCars+Year%3A2004%7CBodyStyle%3AConvertible%7CVariant%3AMK+III+%5B1999-2007%5D+Convertible%7CEngine%3A1794ccm+140HP+103KW+%28Petrol%29&hash=item2ae3459a2e:g:pq4AAOSwY~pecgCt
I would ask your mechanic to check the fuel filter rather than doing the cat.
As I say, no expert whatsoever, just my thoughts!
Good luck.
Spoke with the manufacturer of the cat, he informed me, if it was blocked it wouldn't rev above idle, so didn't swap the cat.
Couldn't get the car on ramps to try a new earth on the crankshaft sensor. Too wet and kept sliding.
Backed out MAF mod and issue is still there.
Continue with trial and error next week, it's a little annoying driving in 5 o clock traffic with everything whizzing past you but at least I'm safe from the police at 70 mph tops. 😁
Hi
@Garfy Did you manage to get Maureen sorted in the end? Sounds like a fuel pressure problem perhaps, especially as it's degrading. Filter or pump?
Hopefully you've got it fixed and I'm far too late with my 2 pence worth
Another vote for fuel filter here. Cheap and easy to do. Worth a try.
Not sorted yet, will be testing with my mechanic today 😁 got a spare MAF and coil pack to swap and try.
Will search on filter issues and rectification (that's a big word for a bank holiday 🤭 )
So, we've swapped MAF, coil packs, spark plugs, made no difference ::) Checked the fuel filter currently checking vvti solenoid and cleaning which works ok. 😤🤔 Mechanic is a little stumped
So, when parked in neutral, push accelerator down, goes up to around 6K revs, drops down to 4K and get black smoke from the exhaust as if it's over fueling.
Compression test was good
This is a very "out there" one but there's nothing fouling your throttle pedal/cable is there? My floor mat once found it's way over the pedal and wouldn't let me give it full beans.
Quote from: Call the midlife! on August 31, 2020, 18:00This is a very "out there" one but there's nothing fouling your throttle pedal/cable is there? My floor mat once found it's way over the pedal and wouldn't let me give it full beans.
If only 😁
No, it's engine related, it revs or tries to initially, then drops down to 3k it's fueling as if you got the pedal down (hence black smoke, petrol smell and black sparkplugs (2 months old)) with an obd reader connected it shows misfires across the cylinders because they're getting too much petrol (I believe). 🤔
Quote from: Garfy on August 31, 2020, 17:31So, we've swapped MAF, coil packs, spark plugs, made no difference ::) Checked the fuel filter currently checking vvti solenoid and cleaning which works ok. 😤🤔 Mechanic is a little stumped
Got a spare engine you can swap in...
Thanks John I'm only on 70k with this one, can't give up on it yet 😥 think when it does go it will be time for a 2zz 🙃
Sounds like a sensor issue. I can send you a crank sensor and a cam sensor... Known working ones.
Quote from: Carolyn on August 31, 2020, 20:07Sounds like a sensor issue. I can send you a crank sensor and a cam sensor... Known working ones.
Thanks Carolyn they would be gratefully received.
The little shop
4 station road
Kings Langley
WD4 8LF
Let me know how to pay you for them x x
Seeing the problem solved will be ample payment.
My favorite CPS issue was a Tach Reading with the Key on, and the engine not running.. Ended up Strapping a 2K resistor across the Input to the ECU leads, and the problem went away.. Car ran better too!
Cap
What is the coolant temp sensor reading on the scanner? Fuel trims? Possible vac leak..
On the way.
Quote from: Cap on September 1, 2020, 00:08My favorite CPS issue was a Tach Reading with the Key on, and the engine not running.. Ended up Strapping a 2K resistor across the Input to the ECU leads, and the problem went away.. Car ran better too!
Cap
Thanks Cap, but I have no idea what you wrote, sorry.
Could you be saying my ECU has turned into Hal and needs some electric shock treatment?
Quote from: mr2garageswindon on September 1, 2020, 10:21What is the coolant temp sensor reading on the scanner? Fuel trims? Possible vac leak..
I can get them checked, could you advise what they should be?
I have a friendly mechanic who does most my work for me, unfortunately this is his first 2 to work on.
Thanks for the input, I've already passed it on 😁
Quote from: Carolyn on September 1, 2020, 11:58On the way.
Many, many thanks Carolyn, there'll be a donation on its way to the club, that way we all benefit from your generosity x x
Forgot to say
@Carolyn all received thank you x x
Quote from: Garfy on September 1, 2020, 20:31Quote from: Carolyn on September 1, 2020, 11:58On the way.
Many, many thanks Carolyn, there'll be a donation on its way to the club, that way we all benefit from your generosity x x
Very generous donation received. Thank you both! That's hosting for a couple months.
Hmmmm, after all that :-X :-\
Tubing from air intake to cone filter was kinked, hence no air getting to engine.
:-[
Quote from: Garfy on September 25, 2020, 09:34Hmmmm, after all that :-X :-\
Tubing from air intake to cone filter was kinked, hence no air getting to engine.
:-[
.... Aftermarket intakes.. I tell ya..
:) :)
Quote from: Garfy on September 25, 2020, 09:34Hmmmm, after all that :-X :-\
Tubing from air intake to cone filter was kinked, hence no air getting to engine.
:-[
I've got to ask, how did you end up getting some 75mm tubing that badly kinked???🤓
@Garfy 10/10 for fessing up.
You must be feeling very mixed emotions!
Quote from: Joesson on September 25, 2020, 11:25@Garfy
10/10 for fessing up.
You must be feeling very mixed emotions!
Needs to be on here in case anyone else has a similar issue 😥
@Call the midlife! It was that tinny tubular stuff you take from the vent and goes to an enclosed air filter 🤯😤🤮😖
Quote from: Garfy on September 25, 2020, 13:38Quote from: Joesson on September 25, 2020, 11:25@Garfy
10/10 for fessing up.
You must be feeling very mixed emotions!
Needs to be on here in case anyone else has a similar issue 😥
@Call the midlife! It was that tinny tubular stuff you take from the vent and goes to an enclosed air filter 🤯😤🤮😖
Right, got you, I've got two lengths of that running from my side scoops into areas of the engine bay so know how easy it is to crush. But they're not connected to anything, just ran it in before I bonded the side scoops on, the mushroom filter is hard piped with silicone sleeves.
Fair play to you for fessing up, you can have my trophy from last year.👍🏻
My list is spare bits is building up ;D
MAF
4 coil packs
Cam sensor
Crankshaft sensor
Throttle body
MAF spacer
4 X injectors.
All ready for next ding day auction ;D