Misfiring Sprint Engine

[john 215]

Hi,

If you had an air leak on that cylinder it would run hotter, although mixture wise it don't look that far off !

Have to admit often get jobs at work where you find several things wrong before you find the ultimate culprit, can be very frustrating at time this messing around with car's thing !


Cheers John


LIVE LIFE A QUARTER OF A MILE AT A TIME!

1976 Speke FHC Beauty Now with an overdrive conversion

1979 3.5 FHC(STATUS PENDING!!)

1982 2.0 DHC NOW A 4.6, BUILT NOT BROUGHT !!!!

[trsforever]

Hi Beans, congrat's on finding the problem, it is often the simple things, you might have to carry a spare in future if the quality is suspect on the new ones.
When you look at your low compression in no 1 cylinder I would recommend testing it with a leak down tester if you can get one, they are much more accurate for trouble shooting, pinpointing where the compression is leaking.

Regards Scott.

[Beans]

Thanks for the tip. But I will first use the car for circa 500 kilometer tour this weekend.
After that I will do another compression test to see if this has changed (I still hope that the lower compression is caused by contamination of the valves).

<center>
<font color="blue"><i>1976 TR7 FHC (needs some TLC ...)
1980 TR7 DHC (my first car, a.k.a. Kermette)
1981 TR7 FHC (Sprint engined a.k.a. 't Kreng
</font id="blue"><b>[url="http://www.tr7beans.blogspot.com/"]<u><b><font size="3"><font color="red">My full Blog</font id="red"></font id="size3"></b></u>[/url]</b></i></center>

[Beans]

Looks like I won't be idle this winter, as this will need some more work [B)]
To be continued in my weblog and the blog section ....

<center>
<font color="blue"><i>1976 TR7 FHC (needs some TLC ...)
1980 TR7 DHC (my first car, a.k.a. Kermette)
1981 TR7 FHC (Sprint engined a.k.a. 't Kreng
</font id="blue"><b>[url="http://www.tr7beans.blogspot.com/"]<u><b><font size="3"><font color="red">My full Blog</font id="red"></font id="size3"></b></u>[/url]</b></i></center>

[john 215]

Hi Beans,

I would, before pulling the head off do a wet compression test and then after running the engine, to burn of the oil, do a cylinder leakage test, any info you can get at this stage may help once the head is off on the bench.

Cheers John


LIVE LIFE A QUARTER OF A MILE AT A TIME!

1976 Speke FHC BEAUTY FITTED WITH OVERDRIVE GEARBOX

1979 3.5 FHC CURRENTLY GARDEN ART !

1982 2.0 DHC NOW A 4.6, BUILT NOT BROUGHT !!!!

[Beans]

Whatever is the problem, it is inside the engine so the head has to come of one way or another.
And pulling the head shouldn't be to difficult and ones it's of should give a good indication of what's wrong.

<center>
<font color="blue"><i>1976 TR7 FHC (needs some TLC ...)
1980 TR7 DHC (my first car, a.k.a. Kermette)
1981 TR7 FHC (Sprint engined a.k.a. 't Kreng
</font id="blue"><b>[url="http://www.tr7beans.blogspot.com/"]<u><b><font size="3"><font color="red">My full Blog</font id="red"></font id="size3"></b></u>[/url]</b></i></center>