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Subject: Chev S-10 2.5
Sender's Name: Joe Henderson
Question: I have a Chev S-10 2.5 it runs great for a while and then acts like it is starving for gas,then it will be ok for a while and then do it again. What could be my problem?
Answer: I am not up to speed with the Chev S, however, I would suggest that you check the fuel supply first, maybe it could be a swirl pot fault (in the fuel tank )..I would expect this fault to get worse if you try to speed up. A supply fault will always get worse if you ask for more fuel.
 
Subject: Vauxhall Astra 1990 1.3
Sender's Name: Rho
Question: I have a Vauxhall Astra 1990 1.3. It has a Pierburg carb, but i would like to change to fuel injection. Is it possible to convert to injection by adding a manifold and taking out the carb. If it is possible, can you do it and for how much.??
Answer: To be honest, I would say " no way " !..it's far too expensive, and not productive. If you really want a fuel injected car, go and buy one ! You could enhance the set up you have by fitting a Weber carburettor, it's about ?260 fitted including set-up and VAT. It'll give you better performance and economy, and it's a better carb all round.
 
Subject: Renault 21 Turbo
Sender's Name: Russell Kavanagh
Question: My Renault 21 Turbo is suffering from mild hesitation on part throttle. The hesitation is always there either when cruising or light-medium acceleration 'off-boost' The car had all new bearings, rings, seals and new valve springs. The head was also gasflowed at the same time. Also, the car has a custom exhaust, induction kit and hybrid turbo. Should I chip it and what other mods should I consider?
Answer: I would need to know what the number is from your ECU to know if a chip is applicable. The misfire,if intermittent, could be due to poor load sensing, causing a weak mixture. A rolling road session would show that one up. It could be that you have an air leak, this could create the lean mixture, and it may be that it only appears worse as the engine leans off with temperature.
 
Subject: Sierra Sapphire Cosworth
Sender's Name: Jason Lowe
Question: I have recently bought a 2wd sapphire cosworth and have noticed that the turbo does not come in until it has been running a while (about ten minutes). Also it sometimes smokes on hard acceleration and when I come to a stand still there is sometimes some smoke,I was told that it could be a gate on the turbo ? and that it would need a new turbo. What would the benefits of a hybrid turbo be and what power increase would i get?
Answer: The wastegate arm may be sticking, unless the car is chipped, in which case it might be the amal valve keeping the boost low for a while. The smoke on hard acceleration may well be due to a worn turbo, especially as it also smokes at idle. Worn valve guides can also cause smoke on start up and overrun. Of course a worn bore will also cause the engine to smoke ! A hybrid turbo is only a good idea if you wish for high boost and big power figures.
 
Subject: Cavalier Mk 2 Sri
Sender's Name: Panda Macleod
Question: I recently bought a Cavalier with rotten back arches. Is there any chance of u telling me how to fix that without having to completely replace the whole back wing. And is there any good web sites that I could have a look at for any body kits and any go faster parts.
Answer: Funnily enough, I thought Cavaliers were made that way !....sorry, but we don't do bodywork, so I'm not really the one to ask.....! Web sites...You could try Demon Tweeks..they are the biggest for sure....Or Ripspeed....
 
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