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carb v fuel injection

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Old Jan 26th, 2007, 20:52   #1
jessejazza
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Hi folks

I'd be grateful if someone could advise on carb v fuel injection.

My old 240 was a carb model. I was thinking about another and getting one with fuel injection as allegedly they are more economical. On a fuel injection which parts wear - is it mainly the pump? and what about costs for parts. I'd imagine much more than replacing a carb.

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Old Jan 26th, 2007, 21:45   #2
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Originally Posted by jessejazza View Post
Hi folks

I'd be grateful if someone could advise on carb v fuel injection.

My old 240 was a carb model. I was thinking about another and getting one with fuel injection as allegedly they are more economical. On a fuel injection which parts wear - is it mainly the pump? and what about costs for parts. I'd imagine much more than replacing a carb.

thanks
In the past Ive owned a carb and electronic injection models. At the moment I have electronic and mechanical injection ones. I think that the injection ones run smoother, cleaner and need less maintenance. I believe that the seals can deteriorate leading to rough running at lower revs. Other than that Im not quite sure as to what the other common problem areas are - all of mine have been very reliable. (Famous last words - one of them will probably break down tomorrow!)

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Old Jan 26th, 2007, 22:02   #3
Alec Dawe
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I have a 1988 240GLT with the mechanical (CI) fuel injection.
It is more economical then my old 245gl which had the 2127 engine with carb.
Having read the Haynes on the mechanical injection, and read any posts on here, it seems to be a very simple sytem, with few major problems.
Most problems can be fairly easily and cheaply resolved (injector to head seals harden and leak sensors sometimes fail, all parts availble).
No black boxes to fail and cost hundreds, no emissions rating, and you can even adjust the mixture.
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Old Jan 26th, 2007, 22:16   #4
Scott Stephen
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Yep i'd agree. Carbs are cool if you like tweaking and adjusting EVERYTHING but they are complex mechanical instruments that need respect and care. CI cars are very simple in design.

I really get peaved with carbs sometimes though as with some weaker designs you just need to sneeze on them and they are out of adjustment!

The Stromberg CD175 carb on my 244 is a relitively simple instrument but you still need to service it with new diaphragms etc.

Fuel injection is certainly more "maintainance free"
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Old Jan 26th, 2007, 22:23   #5
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Quote:
Originally Posted by Alec Dawe View Post
I have a 1988 240GLT with the mechanical (CI) fuel injection.
It is more economical then my old 245gl which had the 2127 engine with carb.
Having read the Haynes on the mechanical injection, and read any posts on here, it seems to be a very simple sytem, with few major problems.
Most problems can be fairly easily and cheaply resolved (injector to head seals harden and leak sensors sometimes fail, all parts availble).
No black boxes to fail and cost hundreds, no emissions rating, and you can even adjust the mixture.
The above advice quote is the best I've heard for ages, most of the parts to service this system are also still avaliable new or S/H. Will also take you round the world and back not sure if my S70R would lol............
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Old Jan 26th, 2007, 23:57   #6
jessejazza
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Many thanks for your quick replies. I'm grateful.
james
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Old Jan 27th, 2007, 09:01   #7
john h
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I agree, injection is best. With Volvo quality, no need to fear the electronic injection either. Even if an ECU goes wrong (pretty rare, in reality, it's fear that makes people wary) there are specialists nowadays who can fix them inexpensively.

John
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Old Jan 27th, 2007, 10:46   #8
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For me there is one thing that is more reliable - an open loop lpg system and none of the petrol problems. Just a tank at the rear, the vapouriser, a mechanical adjuster and the mixer on the throttle body and throw away the petrol system!
Seriously though for practical purposes the mechanical injection is the most user friendly system.

Mike
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Old Jan 28th, 2007, 17:21   #9
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Hi Jesse, Funnily enough the most economical Volvo I ever owned,(and I'm on my 12th), was a 2.3 240 saloon with a Stromberg carb , getting 33 mpg. It also had a Broquet fuel catalyst (so called!) in the fuel tank. But thats one subject I don't want to go over again!.
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