Starting probs, Ecotech - 1 for the techs
Gday fellas,
Im having a drama with the stateo not firing on the first crank. When I first turn the key to start, it'll crank for ages than on the second attempt it fires, gets worse once its warm.
I was think cam sensor but this hasn't sorted it after I swapped it with a spare. Ive changed the spark plugs and the coil packsand still no change. I had platinum plugs in it before and they looked good. Thats why I thinking a sensor. Also a bit of a rotten egg smell from the exhaust. Cat convertor maybe?
Any thoughts?
IF IT DONT BURN FOSSIL FUELS, IT AINT A SPORT!
Try checking to see if any error codes are logged at all.---Checking error codes VR/VS (Revised)---Also the rotten egg gas smell you can sometimes smell shows the catalytic converter is working ok and is converting the exhaust gases into different gases that are less harmful for the enviroment etc...It slowly goes away over time as the catalyst inside the converter wears out.(they last for years though).We used to load new cars onto trucks and swap them between trucks, and all the brand new cars exhaust fumes smelt badly of this rotten egg gas.Its the same when a brand new car overtakes you,they smell pretty bad.They are not as bad though as they used to be when we first changed over to unleaded petrol here in oz.Some of the first unleaded cars exhausts smelled really bad all the time.A lot of people think that if they can smell this rotten egg smell,the catalytic converter is stuffed.This is not right.Brand new cars wouldnt have the same smell if that were the case.
Last edited by Brett_jjj; 15-10-2010 at 03:21 AM.
Real cars are steel cars.
+1 for error code check.
Interesting what you say about the rotten egg smell Brett_jjj.
Im no chemist but my understanding is that the rotten egg smell is hydrogen sulphide (H2S) gas. When this combines with moisture in the air (H2O) you get sulphuric acid (H2SO4) which contributes to acid rain. Not great for the environment. (Sorry for off topic.)
If I told you I was a compulsive liar, would you believe me?
just had a quick look on the net about this,I found this.--Originally Posted by RX25SE
"This is the exact opposite of the truth. The rotten egg smell means that the catalytic converter is working properly.
"It's (the smell) hydrogen sulfide or H2S. It does not exist in the fuel or oil, which is why you can't smell it at the gas station. It does, however, come from the gasoline. Almost all gasoline contains organic sulfur compounds with sulfur levels ranging from 30 to 100 parts per million, approximately.
"As the fuel burns, the organic sulfur compounds break down into simpler compounds. If the engine is running lean (more air than is needed to burn the fuel), the sulfur is likely to be SO2, or sulfur dioxide. The catalytic converter can change this into SO3 (sulfur trioxide), which then reacts with the catalyst to form sulfates on the catalyst. Over several minutes there is a build up of sulfates. If the engine suddenly starts to run rich (not enough air to burn all the fuel), such as when you stop at a red light, climb a steep hill, or brake hard to slow down, the chemistry changes. Now the sulfates are unstable and they react to form hydrogen sulfide, which is expelled from the exhaust pipe all at once. The high concentration is the reason for the bad smell! This effect is a common problem with new vehicles because the catalyst is working at a very high efficiency. However, as the catalyst gets older, the activity drops. Fortunately for us, one of the first reactions to be affected is the formation of hydrogen sulfide. So as the catalyst gets older, the smell will go away. It should also be noted that many catalysts never smell bad. One reason might be because the vehicle doesn't run lean for much of the time, or perhaps the catalyst has an extra component that reduces the production of hydrogen sulfide.
"Next time Eggbert and Shelley stop behind a vehicle that smells bad, they can be grateful that it's at least not contributing much to atmospheric pollution."
Thanks to this month's Whizard, Dr. Gordon Bartley, a senior research scientist in the Emissions Research Department of the Automotive Products and Emissions Research Division. Bartley
specializes in the development, aging, and evaluation of vehicle emission catalysts."
Last edited by Brett_jjj; 15-10-2010 at 11:20 AM.
Real cars are steel cars.
Well there you go.
Learn something every day!
Cheers for the info Brett_jjj.
If I told you I was a compulsive liar, would you believe me?
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