Author Topic: 1.8t won't start when up to temp  (Read 6771 times)

Offline palmtree

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Re: 1.8t won't start when up to temp
« Reply #20 on: 26 February 2012, 16:12 »
no, the default lookup tables in the ecu will keep air/fuel ratio safe enough with the maf unplugged (assuming that is the only faulty part on the fuel side of things). 99.9% certain the crank sensor is causing your warm start issues. That shouldn't cause any damage since as soon as the ecu see's an implausible signal from the sensor it cuts the ignition. When they begin to fail they tend to start showing symptoms once the oil temp is above around 70 degrees.

Thanks for the reply mate, i'll get a new maf and crank sensor ordered up tomorrow and hopefully cure the problem

Offline JimBR

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Re: 1.8t won't start when up to temp
« Reply #21 on: 26 February 2012, 16:30 »
I don't see why they limited your torque, a normal stage one map makes around 230ft/lb on the standard smic and cat back..

Offline navmk4gti

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Re: 1.8t won't start when up to temp
« Reply #22 on: 26 February 2012, 16:41 »
I don't see why they limited your torque, a normal stage one map makes around 230ft/lb on the standard smic and cat back..

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Offline palmtree

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Re: 1.8t won't start when up to temp
« Reply #23 on: 26 February 2012, 19:05 »
i'm not sure to be honest must of been a reason though, it's stage 1.5 map when i got there they said i'd probably make 210-215 bhp but said it was flowing really well so made 332 bhp

Offline Jonnybbad

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Re: 1.8t won't start when up to temp
« Reply #24 on: 26 February 2012, 20:21 »
How have the managed to map a car with a faulty MAF surely air/fuel ratio would be completely wrong and it can't be something you can guess

Offline theshrew

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Re: 1.8t won't start when up to temp
« Reply #25 on: 26 February 2012, 20:52 »
I've not read any of the other posts but if it's bringing up the rpm sensor that can cause starting problems. if its when the cars warm the sensor could be breaking down when it's hot not giving the correct signal hence no starting

Offline palmtree

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Re: 1.8t won't start when up to temp
« Reply #26 on: 27 February 2012, 20:15 »
How have the managed to map a car with a faulty MAF surely air/fuel ratio would be completely wrong and it can't be something you can guess

I wouldn't mind knowing the answer to that either, also have boost surge in 3rd gear since the map

Offline Jonnybbad

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Re: 1.8t won't start when up to temp
« Reply #27 on: 27 February 2012, 20:48 »
Take it back I'm no expert but clearly something not right was the car scanned before the map

Offline palmtree

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Re: 1.8t won't start when up to temp
« Reply #28 on: 27 February 2012, 21:09 »
Take it back I'm no expert but clearly something not right was the car scanned before the map

This is the thing that is bugging me the most I got absolutely no info from anyone as to what was going on, they took the car in put it on the rollers and that was it no communication until it was finished being mapped. Which was to get a new maf run it on good fuel and I need a fmic




Offline JimBR

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Re: 1.8t won't start when up to temp
« Reply #29 on: 27 February 2012, 23:14 »
I had that too. Didn't speak to anyone after an initial hello until the guy said take it for a test drive.