Bobber123
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Registered: 18th Aug 08
Location: E Riding of Yorkshire
User status: Offline
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ok so, today i took a few things off round the cambelt to see what was involved to change my thermostat.
also took out the spark plugs to check them.
i never alterd the position of the cambelt or anything.
now, when the revs build up, it gets to about 5k then splutters a bit and cuts out. I dont think i have nocked any sensors off or anything,
its a 1999 1.6 8v mk4 astra.
cheers,
Rob.
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martyn_1.4
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Registered: 20th Jun 08
Location: Stockton-on-Tees
User status: Offline
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not much help but would you go around where you was working again checking everything, and you didnt damage the plugs when you had them out did you?
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Tiger
Member
Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
User status: Offline
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Crank breather.
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Bobber123
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Registered: 18th Aug 08
Location: E Riding of Yorkshire
User status: Offline
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ive looked around all the things that i touched when i was working on it earlier, ive also checked the plugs again just now and there all fine, took it out for another drive and its not got any power really and the revs get to 5k and it splutters like it just suddenly hits a limiter and then cuts out.
its really annoying me now as i cant figure out whats causing it
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Bobber123
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Registered: 18th Aug 08
Location: E Riding of Yorkshire
User status: Offline
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quote:
Originally posted by Tiger
Crank breather.
wheres that (on the crank somewhere im guessing lol)
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Tiger
Member
Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
User status: Offline
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Is it misfiring?
Is it ticking over correctly?
Is the engine management light on?
Is the air filter positioned correctly and not congested?
Has the oil been changed recently?
Is the engine tapping?
Don't assume its something you've touched, it could just be coincidence.....
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Bobber123
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Registered: 18th Aug 08
Location: E Riding of Yorkshire
User status: Offline
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it does mis a bit but it allways has, when i hold a steady throttle at about 3k it is up and down, seems to rev a bit then drop a bit then rev a bit then drop a bit, then if you build the revs up more it gets to about 5k then cuts out and sometimes the managment light just flashes on and off untill you turn it off and on, i have tried the paperclip test but it just comes up with an old code thats been there for ages P0841 or something wich is a high speed cooling fan circuit malfunction or something.
ive got the battery disconnected at the moment, i have checked the air filter, it is in properly and there is no blockages.
when you first fire the engine up its a bit rough, kind of like its firing on 3 cylinders but not quite that bad.
the oil was a bit low but i added another litre of new oil about 2 weeks ago, i was planning to do a oil and filter change soon though.
the engine is not tapping no.
im cunfused as to what is causing it, its bloody annoying!
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Tiger
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Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
User status: Offline
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Sounds like a MAS fault, or AGR valve problem but it should throw up a fault code....
It could be a coilpack breakdown, which could restrict ignition maybe on 1 cylinder. If the car was misfiring, you'd notice a serious lack of power, the car probably wouldnt be able to go past about 80mph....
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Tiger
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Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
User status: Offline
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Id just go round and check your plugs for all sensors first...
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Bobber123
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Registered: 18th Aug 08
Location: E Riding of Yorkshire
User status: Offline
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whats a MAS fault btw
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Tiger
Member
Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
User status: Offline
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Mass Air Sensor
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Scotty C
Member
Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
User status: Offline
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AFM & MAS, the same thing right?
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Bobber123
Member
Registered: 18th Aug 08
Location: E Riding of Yorkshire
User status: Offline
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ahh right, ill have to find where mine is and check the connections n that, im also gonna try a spare set of plugs ive got lying around. ill try a coil pack from scrappy too.
bloody cars!
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Tiger
Member
Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
User status: Offline
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AFM - Air Flow Meter
MAS - Mass Air Sensor
MAF - Mass Air Flow (Meter)
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Bobber123
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Registered: 18th Aug 08
Location: E Riding of Yorkshire
User status: Offline
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if the cat was nackerd and blocked up would that give these symptoms as i can smell a kind of exhaust internals smell after ive been driving it.. and the exhaust note has changed slightly (i think)
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Tiger
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Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
User status: Offline
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It could be a hot engine you can smell, is the thermostat ok? That could also explain a loss of power....
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Bobber123
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Registered: 18th Aug 08
Location: E Riding of Yorkshire
User status: Offline
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the thermostat could be on its way out, i have actually got a new one ready to fit, the temp needle on the dash is always below 80 like on the coldest it can be, the heaters still blow hot air out. the car has been standing for a while so ill check it in a bit when its cold and see if its any different. i just checked the cat and its fine.. stripped it on the road in the wet on my back 
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Tiger
Member
Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
User status: Offline
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Have a butchers and see if theres anything obvious 
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Bobber123
Member
Registered: 18th Aug 08
Location: E Riding of Yorkshire
User status: Offline
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ok, i just went for a drive in it and its spluttering and running crap, wont go over 4k now and its just generally running crap with no power. i hope i can sort it
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scottyp1989
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Registered: 29th Jul 07
Location: Warley, West Midlands
User status: Offline
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sure your plugs are ok? my 8v astra used to splutter untill i changed te plugs. there are no sensors on these engines to go wrong really so i would start from the easies/cheapest place first and try new plugs, especially if the car has been standing for a period of time, if its the single point engine there are now air flow meters on the engine so wont be that
[Edited on 08-02-2010 by scottyp1989]
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Bobber123
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Registered: 18th Aug 08
Location: E Riding of Yorkshire
User status: Offline
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well, its the 1999 8v ecotec engine.
its a strange feeling, it seems like the engine is being starved of something, it just revs slowly to a certain point then stops dead like its on a limiter. how long would it take for the ecu to reset if i remove the battery?
there is no lights on or error codes to state there is any faults, i dont get it
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Bobber123
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Registered: 18th Aug 08
Location: E Riding of Yorkshire
User status: Offline
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comeing to think of it, it feels kind of like the choke is on, its that kind of feeling
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scottyp1989
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Registered: 29th Jul 07
Location: Warley, West Midlands
User status: Offline
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try cleaning eiter the TPS or ICV or check for vaccum leaks as that can affect running of te engine
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Bobber123
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Registered: 18th Aug 08
Location: E Riding of Yorkshire
User status: Offline
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whats the ICV? and im guessing the TPS is the throttle position sensor?
cheers.
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scottyp1989
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Registered: 29th Jul 07
Location: Warley, West Midlands
User status: Offline
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ICV is idle controll valve
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