QH duff thermostat
26-12-2008, 11:51 AM
#1
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Thread Starter
QH duff thermostat
I went to replace my stat on me 2wd sapph cos, even though it was only 2 weeks old and had been perfect, it had gone duff, it was a QH one.
It was not even rising above the cold mark, and sooting plugs being rich etc.
Anyway got housing off, put on bench, then spotted it, the central pin in the stat which the bits slide up and down on had come out, and was now jammed against the "bridge" piece where it was to start with crimped around the middle section, so pushed pin back in, then reinserted it where it should go, got it in the vice corner and crimped it properly, works perfect again now, never seen that in 25 years before though, it has FRANCE and COLSTAT written on it.
Might be somethging to watch out for, hate to think of one jamming closed, it also seems to have killed my IK31 plugs with it being too rich, grabbed another set out the box, but they were IK24, found some IK27 which should do, beleive this is what NMS use, 31's seem a bit cold and foul too easy, anyone else have this problem.
thanks
tabetha
It was not even rising above the cold mark, and sooting plugs being rich etc.
Anyway got housing off, put on bench, then spotted it, the central pin in the stat which the bits slide up and down on had come out, and was now jammed against the "bridge" piece where it was to start with crimped around the middle section, so pushed pin back in, then reinserted it where it should go, got it in the vice corner and crimped it properly, works perfect again now, never seen that in 25 years before though, it has FRANCE and COLSTAT written on it.
Might be somethging to watch out for, hate to think of one jamming closed, it also seems to have killed my IK31 plugs with it being too rich, grabbed another set out the box, but they were IK24, found some IK27 which should do, beleive this is what NMS use, 31's seem a bit cold and foul too easy, anyone else have this problem.
thanks
tabetha
26-12-2008, 07:40 PM
#3
PassionFord Post Whore!!
26-12-2008, 07:46 PM
#4
PassionFord Post Whore!!
I went to replace my stat on me 2wd sapph cos, even though it was only 2 weeks old and had been perfect, it had gone duff, it was a QH one.
It was not even rising above the cold mark, and sooting plugs being rich etc.
Anyway got housing off, put on bench, then spotted it, the central pin in the stat which the bits slide up and down on had come out, and was now jammed against the "bridge" piece where it was to start with crimped around the middle section, so pushed pin back in, then reinserted it where it should go, got it in the vice corner and crimped it properly, works perfect again now, never seen that in 25 years before though, it has FRANCE and COLSTAT written on it.
Might be somethging to watch out for, hate to think of one jamming closed, it also seems to have killed my IK31 plugs with it being too rich, grabbed another set out the box, but they were IK24, found some IK27 which should do, beleive this is what NMS use, 31's seem a bit cold and foul too easy, anyone else have this problem.
thanks
tabetha
It was not even rising above the cold mark, and sooting plugs being rich etc.
Anyway got housing off, put on bench, then spotted it, the central pin in the stat which the bits slide up and down on had come out, and was now jammed against the "bridge" piece where it was to start with crimped around the middle section, so pushed pin back in, then reinserted it where it should go, got it in the vice corner and crimped it properly, works perfect again now, never seen that in 25 years before though, it has FRANCE and COLSTAT written on it.
Might be somethging to watch out for, hate to think of one jamming closed, it also seems to have killed my IK31 plugs with it being too rich, grabbed another set out the box, but they were IK24, found some IK27 which should do, beleive this is what NMS use, 31's seem a bit cold and foul too easy, anyone else have this problem.
thanks
tabetha
Mark
27-12-2008, 03:57 PM
#5
20K+ Super Poster.
Thread Starter
Mark,
My car is mapped right, but if YOU can make a car run perfect with a fully jammed open thermostat please tell everyone how, as temperature unless I'm mistaken is a major determining factor for fuelling is it not ?
And yes my car does run perfect but thanks for the enquiry anyway.
The reason why I did not take the stat back was all the shops were shut over xmas etc, I reasoned that all the makers do is to crimp the bridge, so that's all I did but tighter, suppose they must miss the odd one out of the many millions they make.
tabetha
My car is mapped right, but if YOU can make a car run perfect with a fully jammed open thermostat please tell everyone how, as temperature unless I'm mistaken is a major determining factor for fuelling is it not ?
And yes my car does run perfect but thanks for the enquiry anyway.
The reason why I did not take the stat back was all the shops were shut over xmas etc, I reasoned that all the makers do is to crimp the bridge, so that's all I did but tighter, suppose they must miss the odd one out of the many millions they make.
tabetha
Last edited by tabetha; 27-12-2008 at 03:58 PM.
27-12-2008, 04:02 PM
#6
PassionFord Post Whore!!
Mark,
My car is mapped right, but if YOU can make a car run perfect with a fully jammed open thermostat please tell everyone how, as temperature unless I'm mistaken is a major determining factor for fuelling is it not ?
And yes my car does run perfect but thanks for the enquiry anyway.
The reason why I did not take the stat back was all the shops were shut over xmas etc, I reasoned that all the makers do is to crimp the bridge, so that's all I did but tighter, suppose they must miss the odd one out of the many millions they make.
tabetha
My car is mapped right, but if YOU can make a car run perfect with a fully jammed open thermostat please tell everyone how, as temperature unless I'm mistaken is a major determining factor for fuelling is it not ?
And yes my car does run perfect but thanks for the enquiry anyway.
The reason why I did not take the stat back was all the shops were shut over xmas etc, I reasoned that all the makers do is to crimp the bridge, so that's all I did but tighter, suppose they must miss the odd one out of the many millions they make.
tabetha
.Mark
27-12-2008, 04:03 PM
#7
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having the stat stuck open shouldnt make plugs foul only if fueling is too rich,
would just make engine warm up slower......shouldnt effect fueling unless its not been set right,was cold start mapped???
would just make engine warm up slower......shouldnt effect fueling unless its not been set right,was cold start mapped???
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27-12-2008, 04:07 PM
#8
PassionFord Post Whore!!
Once started the afr should be only slightly richer than normal running as you know, So I agree a revisit of the warm up mapping should be looked at.
Mark
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