Coming home from the weekend on the motorway, my car started running on only three cylinders. I have got it home and had a look. All four plugs have a good spark, however I changed these incase. Im starting to think it is eaither a bent valve or a blocked injector.
The car had a new engine fitted only 6000 miles ago, so bent valve is gonna be worst case scenario.
Does anyone else have any suggestions?
2007-03-27 02:10:06 · 10 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
probally not the valve probally just a vacume tube fell off start it and listen for a hiss could be egr valve or a plug wire arching or an injector isolate the cylender and focas on that one dont wast your time on the others
2007-03-27 02:49:30 · answer #1 · answered by mobile auto repair (mr fix it) 7 · 0⤊ 0⤋
If it is a new engine like you said, the best thing to do is to bring it back under warrantee. From there they will do an individual cylinder compression test. Could be something as simple as a broken or loose rocker arm. They can replace a rocker, but if the rocker is attacehed and you have no compression, then the head will ned to be replaced under warrantee. Most engines come with a 3 year 36,000 mile warrantee.
good luck.......
2007-03-27 03:24:24 · answer #2 · answered by mailbox1024 7 · 0⤊ 0⤋
bent valves would show up on the plug, it'll be black and wet...
its not likely to be a blocked injector either...
check the head gasket... look for oil in the rad, or water in the oil... (youll tell if it has gone.)
remove plug; then using a tyre inflator and a wet rag (to get a seal) pressurise the cylinder. (valves closed at TDC) and listen...
head gasket failure will presurise the water system and youll get air in the rad/top up bottle, or the oil system, depends where its gone...
valves bent will pressurise the fuel system (opne the tank cap and listen for bubbling (inlet) and the exhaust pipe will whistle if its the exhaust valve
rings gone will pressurise the block, and youll hear it at the oil fill on the rocker box...
we use an old spark plug, with the ceramic smashed, and a tube welded on, with a schrader valve (tyre valve)... works every time...
if you cant weld, use araldite...
2007-03-27 02:19:50 · answer #3 · answered by Anonymous · 0⤊ 0⤋
You say a new engine..? do you mean a refitted engine? First, do a compression check (will separate injector from valves/rings.) Either way, if its compression its major investigation time.
2007-03-27 02:21:11 · answer #4 · answered by johncob 5 · 0⤊ 0⤋
Wow, that happen to me 6 years back and it was a bent valve due to timing belt going bad.
2007-03-27 02:26:03 · answer #5 · answered by Silent Assassin 1 · 0⤊ 0⤋
Could be your timing belt has slipped a notch - some cars can suffer this without disasterous consequences.
Try a compression test.
2007-03-27 08:38:12 · answer #6 · answered by Seopard 3 · 0⤊ 0⤋
Check the compression
2007-03-27 04:26:34 · answer #7 · answered by Hunter3333 2 · 0⤊ 0⤋
do a compression test next. you can even do specific tests on each cylinders but I don't know how.
2007-03-27 02:17:20 · answer #8 · answered by JandA 2 · 0⤊ 0⤋
hi, check the compression, could be the head gasket.
2007-03-27 02:59:29 · answer #9 · answered by tony wertyuio 1 · 0⤊ 0⤋
i
could be lost of compression
or a bad lifter
2007-03-27 02:14:57 · answer #10 · answered by pcc122 4 · 0⤊ 0⤋