Bissmire
Member
Registered: 30th Sep 08
User status: Offline
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OK, so I have had some problems recently with my Corsa running an x18xe1 lump.
It was idling rough, and sometimes stalling when approaching junctions and coming to a stop. I carried out the yellow wire mod which fixed the issue, but it starting to return (Slightly different idle, more erratic so maybe not related to YWM)
I have since replaced the Lambda, Cam and Crank sensors. I also started the engine, and when I unplugged the MAF the idling became better. I then replaced the MAF, but the car still ran like shit. Next up is coil pack, but I was wondering if anyone has had similar problems, and how you solved it? If the coil pack doesn’t solve the issue I haven’t got a clue what else it could be...
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djgritt
Premium Member
Registered: 1st Nov 07
Location: Dorset Drives: Focus ST / Hyundai i20N
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Replace the MAF with a KNOWN working one as a test.
Mine had all these symptoms - did the wiring mod and it seemed to improve it, but didn't. Plugged in another MAF and it was worse, then refitted one that was in beforehand and it worked the same as if the guffed one was unplugged - fitted a brand new GM one, and everything went away straight off and it been fine since
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Hodgy
Member
Registered: 29th Dec 09
Location: Felling, Tyne and Wear
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you changed the egr valve ??
common fault on a x18xe1 see if it had a hole in it turn the engine on and spray carb cleaner on it if revs change you know it is sucking air in some where
also is your fuel pressure spot on ???
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Bissmire
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Registered: 30th Sep 08
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I replaced the MAF with a brand new Siemens VDO item, and it did improve things slightly so I'm not sure its that. Don't fancy spending another £117 for a GM MAF incase it has no affect. Thing is, it seems to idle fine when the automatic choke kicks in, but them idles lumpy, and misses. Sounds completely different too. Going to check the Coilpack tonight.
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Bissmire
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Registered: 30th Sep 08
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I blanked the EGR off on Monday which helped things a little, was told it was done so didnt check, but turns out it wasn't.
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Hodgy
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Registered: 29th Dec 09
Location: Felling, Tyne and Wear
User status: Offline
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quote:
Originally posted by Bissmire
I blanked the EGR off on Monday which helped things a little, was told it was done so didnt check, but turns out it wasn't.
Clean throttle body mate there is a breather. Hose that goes to the rocker cover size of a pin head gets clogged causes all sorts of problems
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Bissmire
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Registered: 30th Sep 08
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Yeah I cleaned the Throttle Body too 
Havn't cleaned the breathers so I'll try that.
My gut feeling still says coilpack, but then again I was convinced it was MAF 
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Hodgy
Member
Registered: 29th Dec 09
Location: Felling, Tyne and Wear
User status: Offline
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Only others could be the cts or the carbon canister not plumbed in properly
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Bissmire
Member
Registered: 30th Sep 08
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Yeah, well fingers crossed I'll get it sorted tonight, if not, expect to see this bumped
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Bissmire
Member
Registered: 30th Sep 08
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Just found a crack on the Inlet Manifold 
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djgritt
Premium Member
Registered: 1st Nov 07
Location: Dorset Drives: Focus ST / Hyundai i20N
User status: Offline
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Ouch. That won't help! 
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Bissmire
Member
Registered: 30th Sep 08
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Maybe an excuse to get an uprated item  Looking to see if z18xe manifolds bolt straight on, if so may just get one of them for the time being.
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Hodgy
Member
Registered: 29th Dec 09
Location: Felling, Tyne and Wear
User status: Offline
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quote:
Originally posted by Bissmire
Maybe an excuse to get an uprated item Looking to see if z18xe manifolds bolt straight on, if so may just get one of them for the time being.
Z18xe standard inlet. Bolts straight on mate obviously use x18xe1 throttle body lol I have just baught uprated black one lol so will see what its like
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Bissmire
Member
Registered: 30th Sep 08
User status: Offline
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Yeah nice, I've seen those dbilas reps on ebay, look good. Let me know what theyre like
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Hodgy
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Registered: 29th Dec 09
Location: Felling, Tyne and Wear
User status: Offline
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i will do mate its on me build thread when i add pictures i just hope im not dissapointed.... lol
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Bissmire
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Registered: 30th Sep 08
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Incase anyone was wondering, took the inlet off to find a 3"x1" hole on the side by the alternator. Guess that explains it Fitted a new inlet, cleaned the TB, blanked the EGR and fitted my John Ashley 4-1 and it runs better than ever, very happy 
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djgritt
Premium Member
Registered: 1st Nov 07
Location: Dorset Drives: Focus ST / Hyundai i20N
User status: Offline
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Much difference noticed from the Manifold?
Thinking of one for myself very soon...
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Jed D
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Registered: 15th Mar 11
Location: Durham
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do them manifolds hang low?
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Bissmire
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Registered: 30th Sep 08
User status: Offline
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quote:
Originally posted by djgritt
Much difference noticed from the Manifold?
Thinking of one for myself very soon...
Not a huge difference, but feels and drives so much better. It feels a little pokier, but that could be down to the fact that the hole in the inlet was causing it to run rough. Well worth cleaning the TB out as I think that has helped a lot.
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Bissmire
Member
Registered: 30th Sep 08
User status: Offline
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quote:
Originally posted by JedDy
do them manifolds hang low?
No, but my sump plug is about 2" off the floor so the manifold is the least of my worries
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