Join Date: Jan 2017
Location: Sydney, Australia
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Re: Crankshaft Timing Mark TDC
Okay, so we were running well... until today. I hadn't driven the car in 36 hours.
Had trouble starting, tried two or three times where the engine would crank, but it would just die. I ran the fuel pump a few times, put my foot on the accelerator and tried, and she started. Starting the car after work was no issue. I should also add it was a bit colder this morning, 8 degrees celsius, and in the afternoon it was about 20 degrees celsius.
Today I also lost acceleration, this past week it has been better than ever, but today it had lost so much. The idle is also rough, not high, but rough.
What's been happening over the past week, is there's been a delay between starting and the tachy kicking in. When it does, it usually shows about 750rpm. Then it would pick up to about 950rpm. Idling after driving is about 950rpm. This has not changed. When stopping on hills and trying to pull off, it has been a bit of work to prevent the revs from dropping low enough for it to stall, which seems to happen less than 500rpm. The throttle was also sticky, I did notice a bit of a build up in the throttle body, but didn't get around to cleaning it yesterday. The throttle was not sticky today.
Since I got the car almost three years ago, a full tank would always give a range of 389km. Now it's showing me 530km and this seems to be accurate.
I'm hoping that the issue is fuel - maybe a clogged fuel filter. I'm thinking that if it's running lean, opening the throttle without much more fuel being added, would cause the reduced acceleration.
I'm thinking that if it was a vacuum leak that the revs would be higher. Air filter was changed three months ago.
I'm thinking that if it was a compression issue I'd have trouble starting all the time, and also if it was the valves, the issue would be consistent.
I did change the spark plugs when I did the belt, and torqued them to manual spec.
So far, there are no apparent leaks. The engine bay does smell like coolant, but to be fair I spilled a fair bit trying to bleed the lines
The other thing I'm thinking is the crank position sensor. I'm honestly not too sure how this works though.
Would anyone please be able to shed some light?
2008 Tiburon GK, 2.7L, 6MT, 85k km, stock