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Subject: Enging Tuner || New Question
Sender's Name: Andy
Question: Car = Subaru Impreza Turbo 2000 My car has developed the problem that when driving in 4th under full load high up the rev range I get a violent jerk (fuel cut) I had a look at my boost gauge and in 1st-2nd-3rd the car happily boosts to 20 psi, but in 4th im boosting to 22.5 psi. tonight when I thought id see if it was still happening I accelerated in 3rd under full load and the car went into limp mode and cut out. I started the car on the move no problems but obviously the check engine light was on and the car would not come on boost. When I came home I read the fault codes and the dreaded MAF showed up but also fault 12 starter signal. What I cant understand is why fault 12 showed up! car starts fine every time. Any ideas? Any ideas on why im hitting the fuel cut under load? Cheer Andy
Answer: Hi Andy - I would worry about the overboost first! If this car hasn't been modified in any way, you are in danger of a blow up. Theoretically, the fuel cut is dealing with it, but you obviously have a problem, so I wouldn't be pushing it. The first thing is to check the wastegate actuator for a puncture, followed by a check for split hoses. If you can't identify it from that, take it to a specialist, and soon!
 
Subject: Enging Tuner || New Question
Sender's Name: rich brooks
Question: hi alan,ref to the remap just done on sat 13th,sweet mate,i spoke to martyn about another turbo,vf34 or vf35,this is going to be the next step,can you confirm that either of them will do the job and that they both fit directly on with no alterations needed,i will be looking to purchase a secondhand one in the very near future,it will need fitting and remapped again,i dont want to buy the wrong parts,pls let me know which one to go for.thanks mate
Answer: Hi Rich - VF34 or VF35 goes right on with no trouble, if you'd like us to quote for a new one, ask away! The VF34 has the roller bearing, so some say it's the better bet!
 
Subject: Enging Tuner || New Question
Sender's Name: Nathan
Question: Astra SXi 1.6 - Hi Alan, i\'ve just recently bought the named car on a 02 plate. its standard at the moment but im wondering what are the best \'mods\' fot tuning the engine, dont want to increase the power by too much, and am pretty limited as to how much i can spend (say around 550). any thoughts/ideas.tips? cheers
Answer: I'd only recommend a Superchip and air filter anyway. Cost around 350, and the effect would be just a touch of extra power in the mid range.
 
Subject: Enging Tuner || New Question
Sender's Name: Alex
Question: Hi, my MG ZR had lost a lot of power. Poor acceleration. I had it diagnosed - oxygen sensor fault, had replaced it - fault cleared but still poor acceleration. Could it be fuel filter problem? or cat faulty? Any advice would be appreciated!!!
Answer: I would say take it to a rolling road operator, who can check it out properly on the move.
 
Subject: Enging Tuner || New Question
Sender's Name: Mark Johns
Question: Hi Alan, I\'m getting excited about getting my car up to you next week to start the work on remapping her to the new powers. However being an avid forum guy, I\'ve read that the ECUtek remap which is the one I assume your using can if using the tephra moddified roms, will allow a switchable anti-lag, and also a Valet mode (aka Wife mode) which would cap the top rev limit at a set amount say 2,000 revs. Is this something your able to do when I send the car up to you. regards Mark
Answer: Hi Mark - Best bet is to chat to Martyn about this one! He's away for a couple of days, back on Saturday morning.
 
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