jay.jay
Member
Registered: 28th Dec 10
Location: Gloucestershire
User status: Offline
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Just got my LET started for the first time since I've had the engine, starts fine but runs like crap and sounds really lumpy. The revs seem very lazy to pick up as well. My boost gauge is saying there's practically no boost at all throughout the rev range. I have one sensor unplugged as there is no wire for it on my loom, it's the sensor on the tophat in the picture below:
What is this sensor and could it be causing the problem? I'm pretty sure there isn't a boost leak, I've got an EML come up but will read that off tomorrow if I get chance. Just wondered if anyone has had a similar problem?
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Kieran
Premium Member
Registered: 12th Sep 08
Location: Kent
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That would be your problem. I think it's a second air sensor mate. need a new loom or trace your loom back and see if there's a wire hiding
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jay.jay
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Registered: 28th Dec 10
Location: Gloucestershire
User status: Offline
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Cheers for the reply mate, yeah I've got a spare plug on the loom but it doesn't match up with the back of that sensor, don't suppose anyone has a picture of their sensor to make sure mine hasn't lost part of the connector?
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gazza808
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Registered: 30th Jun 08
Location: Peterborough
User status: Offline
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that hose on the top hat doesnt look clamped on, boost leak ahoy,
and probably sucking in air on idle.
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jay.jay
Member
Registered: 28th Dec 10
Location: Gloucestershire
User status: Offline
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Sorry forgot to say that the hose in the picture was just undone to try and look for a leak lol when the car was running it was clamped on trust me 
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gazza808
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Registered: 30th Jun 08
Location: Peterborough
User status: Offline
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Them spring clips are pants, of swap it for a decent jubilee clip,
That's your air temp sensor next to it,
Have you flashed it see if any codes are coming up?
Done a leak test with a kit?
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jay.jay
Member
Registered: 28th Dec 10
Location: Gloucestershire
User status: Offline
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Yeah they are a pain in the ass as well, I've replaced them all with jubilee clips now dw. Haven't had chance to flash it yet so will do it after weekend, I've had a look at them leak testing kits and they're bloody expensive for what they are, gonna make one myself with the tubing I have left over . Also, I've noticed that my loom doesn't have a knock sensor and icv mini loom? Although they are both connected because there are plugs for them coming off the main injection loom :s I think this loom has been chopped and screwed a fair bit so that might be why I'm having these problems
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--ToM--
Member
Registered: 23rd Nov 07
Location: Wirral
User status: Offline
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That's an aftermarket air temp sensor that's why your plug doesn't match up you've probably got a 2 pin vauxhall plug same as the coolant temp sensor or idle control valve type? The air sensor you have is spade terminals cut your plug off your loom and crimp two spade terminals onto the wires and connect it up
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jay.jay
Member
Registered: 28th Dec 10
Location: Gloucestershire
User status: Offline
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I've ordered myself a proper plug one now just waiting for it to arrive, I did cut the wires and join them up to try but it made no difference (tried terminals both ways) I'll see how it goes when the new one gets here
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