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Gulfsailor

Car won’t go uphill after service

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I have a 2004 Toyota Sportrider 3.0 D4D, which is in a general great condition and drives great, but is sorely lacking regular maintenance. I recently had a long road trip and on the way back my front left brake was making noises. I went to the garage and yes, the pad was worn down, a bit had chipped off and also damaged the disc beyond repair. Anyway since parts and labor are cheap, I decided to go for a more or less full service, or at least the things I could think of which hadn’t been done recently or which I suspected were past due some attention;

-Brake pads front plus one disc

-brake things in the back cylinders

-engine oil and filter

-differential oil 

-all grease points on the drive train

-air filter

-transmission oil

-topped up all other fluids

 

The car now feels like new and drives great in all conditions except going up a steep hill. In the past it would just accelerate and rattle up, but now it very smoothly doesn’t. On a moderately steep hill I’m happy if I can get the car doing 40kmh, where before the service it could get up the same hill doing at least 70 or 80.

 

On a flat surface the car rolls easily in neutral, so it’s not the brakes. It also accelerates and shifts fine on flat roads. Much smoother actually then before the service. I haven’t checked top speed, as I have to leave the island for that. I checked the new air filter and all appears okay. So the only thing I can think of is that the new transmission fluid did something to my gearbox. I did check what the mechanic put in and it was as indicated in the manual. However the manual mentioned 2.8 liters (I think, it’s in Thai), whereas the mechanic kept filling up but by bit after that while checking the level and managed to get 4 liters in there. He was rather surprised. He didn’t change the filter or gasket though. Nothing is leaking or wet around the gearbox, and it doesn’t feel warmer than before from the inside. 

 

Any ideas? Overfilled transmission? The shift changes are much smoother now than before the service, so that is weird. 

 

 

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4 minutes ago, Gulfsailor said:

Any ideas? new transmission fluid did something to my gearbox. 

Well that wouldn't cause engine power loss, could be many other things did they do any valve adjustments.

Sounds like compression lost or fuel pump pressure leak to the common rail.

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This is an odd one. Presume you checked the transmission oil level?

 

Do the engine revs rise without the car moving much? If so, wrong grade or wrong type of transmission oil?

 

Have you any more detailed info?

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15 minutes ago, Kwasaki said:

Well that wouldn't cause engine power loss, could be many other things did they do any valve adjustments.

Sounds like compression lost or fuel pump pressure leak to the common rail.

No adjustments were done. I’ll replace the fuel filter next, as I can’t remember when if ever that was done. But the coincidence for the problem arising immediately after the service is weird. 

Unless my gf put <deleted> diesel in the car shortly before the service, and I didn’t drive uphill until after the service. 

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19 minutes ago, DaRoadrunner said:

This is an odd one. Presume you checked the transmission oil level?

 

Do the engine revs rise without the car moving much? If so, wrong grade or wrong type of transmission oil?

 

Have you any more detailed info?

The mechanic checked the level constantly while filling up bit by bit. I tried finding the level stick for it, but can’t seem to locate it. It’s buried somewhere deep. I’ll look for it again tomorrow. 

They used Dexron 3 I think, which was also listed in the manual (unless that’s for the manual gear transmission, not auto, I can’t read Thai).

the engine revs don’t go up, so it’s not like something is slipping. It feels more like I’m dragging a 2 ton trailer up the hill. 

 

I’ll put the car in 1st and second gear tomorrow while driving on a flat road to see how high the revs will go. The auto transmission shifts up to 3, 4 and OD at around 2000 rpm when driving normally. Going uphill it needs to be able to get a lot higher than that before shifting up of course. 

 

Ps. No black or blue smoke is billowing out when I crawl up the hill pedal to the metal. 

Edited by Gulfsailor

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Ah, I’m just reading of the symptoms of a bad mass air flow sensor. That certainly sounds like a possibility. At one point the mechanic did remove the air filter cap and hose completely to get access underneath. Maybe a plug got undone, or the sensor or cable was damaged. I’ll look for visual damage tomorrow.

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Check the transmission oil. Also, brake disks should be replaced in pairs.

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8 hours ago, Gulfsailor said:

bad mass air flow sensor.

May well be that there's 10 other things too but if the motor was running OK before a spanner worked on the motor sounds like a simple fix, also Dexron 3 is trans fluid for auto transmission.

Here's a another read 

https://cartreatments.com/car-losing-power-when-accelerating/

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4 minutes ago, IraqRon said:

sounds like dirt in the gas line and fullish fuel filter, going uphill causes the fuel pump to increase the pressure of pumping more fuel and draws more of the dirt, or sediment, in the line to the filter and clogs it to some extent,  I had the same thing happen to me in two vehicles while climbing hills and it was the clogging of the filter.

The Vigo has a yellow dash warning light for that..

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1 minute ago, transam said:

The Vigo has a yellow dash warning light for that..

good idea on toyota's part, wonder if his 2004 sportrider has same?

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8 minutes ago, IraqRon said:

good idea on toyota's part, wonder if his 2004 sportrider has same?

Probably, my 2007 did, same engine and induction...

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if you still thought the ATransmission was at fault?

 

I have found the following 2 blokes running

 the Youtube Channels below, to be goldmine for information on all about ATs and CVTs ... not surprising the names of the Channels:

"Automatic Transmission"

and 

"WeberAuto" 

 

quite a significant Libarary of Models worked on!

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