1964 Daimler v8 250 - losing power and back firing
1964 Daimler v8 250 - losing power and back firing
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Chic Wedding Car

Original Poster:

5 posts

174 months

Wednesday 14th September 2011
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Hi is there anyone out there that can shed some light on the problem I have with my Daimler? I have been out in her after a major service (carried out by specialist Jag garage) and a couple of miles down the road it started to judder and loose power (Approx 50mph) and back fired a couple of times. I took it back to the garage and they went through the service parts that were changed and said "it is probably the condensor"....... Does this make any sense as they were not sure exactly and they have had the car for a week now?

Thanks in advance

Marquis Rex

7,377 posts

262 months

Wednesday 14th September 2011
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How much experience do they have with older classic cars equiped with carbs and a dizzy?

When you say backfire- was it really backfiring through the intake or just misfiring.
If it was misfiring it could be the condenser or any other number of components of the ignition system (or even the fuel system for that matter). If it's backfiring, well the only time I had that was when I ran my old BMW inadvertently very lean under transient load and the car shook and backfired through the intake air mass meter with a loud bang!

Dogwatch

6,367 posts

245 months

Wednesday 14th September 2011
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Have they cocked up the timing?

Marquis Rex

7,377 posts

262 months

Wednesday 14th September 2011
quotequote all
Or connected the plugs in the wrong order!

Chic Wedding Car

Original Poster:

5 posts

174 months

Wednesday 14th September 2011
quotequote all
The Garage is is called "Flying Cat Engineering" and they are specialist's in Jag's and Daimler's based in Herts, they I would imaging know what they are doing!

When I was driving down the road it was spluttering and then a loud pop or bang with clouds of crap came out the back through the exhaust!

Wizardskills

243 posts

190 months

Thursday 15th September 2011
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Marquis Rex said:
How much experience do they have with older classic cars equiped with carbs and a dizzy?

When you say backfire- was it really backfiring through the intake or just misfiring.
If it was misfiring it could be the condenser or any other number of components of the ignition system (or even the fuel system for that matter). If it's backfiring, well the only time I had that was when I ran my old BMW inadvertently very lean under transient load and the car shook and backfired through the intake air mass meter with a loud bang!
I had a very similar problem with my GT6. Loss of power and then backfire. This was being cause by fuel leaking out of the carbs, and thus it running lean. If they took the carbs apart for the service, make sure they are all put back together ok. Also check the tuning of the carbs as well.

NHK244V

3,358 posts

195 months

Thursday 15th September 2011
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could be the condensor, if it's gone the power will be jumping the points gap and setting the inlet chatge off at all the wromge times, it should have been changed at the service but i have had a LOT of crap new ones over the last decade or so.
No idea why it's been there a week, if it was the condensor they could have just put the old one back in to test it, i doubt it's wronge firing order as you drove it for a while in good health, they "may" have forgotten to tighten the dizzy and it moved though ??