View Full Version : Question? MAF Faultly
robcopland
10-01-2004, 16:15
What the problem is that my MAF is faulty (due to be replaced in a week or so), can this cause my Ibiza to over heat. Was sitting waiting for car to be washed then all of a sudden car started beeping telling me that car is over heating. If this is not the problem what else should I be looking at?
Rob
I doubt the MAF would cause overheating. I'm also awaiting a new MAF and the problems i experience realte to power delivery.
Over heating is generaly caused by the coolant pump realy (or something that sounds like that)
Faulty MAF's will cause the power to be down not cause the car to overheat.
You might have a temp sensor that flipped.
danny842003
11-01-2004, 14:45
yeah more likely a temp sensor the maf will just stop the car evving freeley when driving possibly sporadicaly.
or it could be the fuse for the fan thats on top of the battery
MArk
is normally the actual fuse box itself on top of battery that braks inside done many before
goble tell me- is there actually a seat dealer in jersey? where is it?
cheers
Mark:p
robcopland
25-01-2004, 10:19
Checked the fuses on top of the battery, and they all same to be fine. So do you think that is a sensor that has gone? Had the MAF replaced and all faults were cleared. If it was a senor, would it show on the computer?????
Too rich a mixture can cause overheating. The fuel creates heat instead of engine-turning energy. Just a thought.
Yes, but I dought so much that you could actually notice it.
Are you sure it was the over heating beep?? was the gauge reading over 100 degrees..In this weather it could be the ice warning
Too rich a mixture can cause overheating. The fuel creates heat instead of engine-turning energy. Just a thought.
are you sure about that?
surely fuel would only create more heat if its being burnt, overfueling means there is excess fuel being UNBURNT as far as im aware.
Also, fuel acts as a cooling factor-i know of someone who is building a polo G40turbo (T40) and he has actually melted pistons before due to underfueling, which means the combustion area is geting too hot.
Mark
Yes, too rich a mixture can cause overheating, and overfuelling is the same thing. Had a terrible time with it on a tractor engine once, although that was also allied to spill timing. Being old technolgy, they don't have a throttle as we know it, just more or less fuel is squirted in to increase or reduce revs. The intake is always fully open.
Basically if the fuel's energy isn't used up by forcing the pistons down, the excess energy left over moves in to the engine as heat. It can also do this, to a degree, by carrying on the burn process in the exhaust, and the exhaust pipe transferring it to the engine by way of conduction. Black smoke on diesels is generally due to overfueling, (or poor compression,) blueish smoke on petrols. I think I read all that in the Blue Bosch Book.
Yes, fuel is also used as a coolant, especially in air-cooled, or highly tuned engines. Petrol, being a spirit, will draw heat from anything so that it can evaporate, so a richer intake charge will generally have a cooling effect. Although richer mixtures don't make the best maximum power.
Too weak a mixture is quite often signified by too much heat too, that's true. There's an ideal middle ground, (stoichmetric rate, or something,) but it doesn't necessarily match up with approved emissions. One thing which causes piston problems is poor squish bands, the profiles area around the edge of the combustion chamber, which forces all the gas towards the spark plug, or center of the chamber. If it doesn't force the majority of it inwards, the burning gasses will reach the edge of the piston and can melt it. This is one of the reasons why VAG's Fuel Stratified Intake is so clever, and also why your friend was told his mixture was too weak. (Which can also cause pinking problems.)
Sorry for the long reply. Bit bored tonight!
Cheers,
Adam.
(No doubt everyone will disagree with all of the above!)
Ok, so i was kinda 1/2 right?;)
Mark
The truth is there's always a different way of looking at everything.