SE5 stalling at junctions

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housemartin
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SE5 stalling at junctions

Post by housemartin » Sun Jul 14, 2019 1:17 pm

Good afternoon guys.
I was hoping you might be able to assist me in solving a stalling problem with my rebuilt engine.
The car starts quickly but idles roughly and feels strong from 2000 rpm upwards, but stalls when I get to a junction or press the clutch down when above 200 rpm.

I have set the timing to 10 degrees with a strobe, fitted a new coil, rotor, cap, points and condenser.
Engine temp seems steady 100 degrees and no water loss.

Fitting a colourtune plug to engine I have set the idle to a nice blue.
However the colourtune spark seems to miss a spark every so often.

Could this be an air leak, or fueling issue?
Is there a fuel circuit stops the car stalling on the overrun?

There car has been off the road for 12 months.
Cheers
Dan



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SE5 stalling at junctions

Post by rebel alliance » Sun Jul 14, 2019 2:48 pm

New head gaskets fitted ?



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SE5 stalling at junctions

Post by scimjim » Sun Jul 14, 2019 4:22 pm

Confirm that you’re losing spark by putting the strobe onto each lead in turn. I had a dodgy distributor cap (no visible faults at all) that was causing intermittent spark on several cylinders.


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SE5 stalling at junctions

Post by housemartin » Sun Jul 14, 2019 5:19 pm

rebel alliance wrote:
Sun Jul 14, 2019 2:48 pm
New head gaskets fitted ?
Good shout.

I purchased new gaskets and reassembled to find I had oil leaking through the new head gasket, so had the heads skimmed.
However I did reuse the same new head gaskets as they had not seen any action.
I will do a compression test, should they be about 120 psi?
I do hope the block is not warped!

Cheers
Dan



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SE5 stalling at junctions

Post by rebel alliance » Sun Jul 14, 2019 5:34 pm

After you had the heads skimmed how was the fit of the inlet manifold before you tighened up the bolts...Also this may be a problem some head gaskets leave a bit sticking out which needs trimming off or the inlet wont seal
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SE5 stalling at junctions

Post by housemartin » Sun Jul 14, 2019 6:03 pm

Yes I saw this and trimmed the head gaskets.
Pressure test give 110psi on all cylinders but the cheap compression gauge shows it flicking up to 140 before dropping down.
Could this be the leaky gasket?
Thanks for your assistance
Dan



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SE5 stalling at junctions

Post by rebel alliance » Sun Jul 14, 2019 6:48 pm

150 psi is normal on a good engine..compression test won't show up any inlet manifold leak...i had poor running at idle and low speed on my 5a. After it started leaking water into the sump i found the inlet manifold was not seated correctly...this may not be related to your problem but if you skim the heads you alter the fit of the inlet manifold



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SE5 stalling at junctions

Post by Rev Light » Sun Jul 14, 2019 9:59 pm

I had a stalling at junctions issue a couple of years ago. Turns out I had dislodged the auto choke housing on the carb, where the water pipes come into the carb. It meant that the choke was effectively on all the time.

Just a thought

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SE5 stalling at junctions

Post by housemartin » Mon Jul 15, 2019 10:01 pm

Guys thanks for the advice
I am off for a week holiday, but will borrow a vacuum gauge, alternative DGAS carb and cap/leads from a know running engine and let you know the result.
Cheers
Dan



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