Guest OB6D Posted August 3, 2006 Report Share Posted August 3, 2006 Howdy peoples, When my engine is idle it revs itself. The revs go up down, up down, up down with about 200 rmp. It makes me nervous. At the traffic lights it's like i'm one of those dudes that's constantly playing with the throttle. It used to smooth out when i would squueze the bypass for fast idle shut, but that don't help anymore. The engine is also not to eager to run above 4000 rpm. I've heard a sort of backfire rumble in my exhaust, these poof, poof, poof, sounds on release of the throttle. Performance i guess is fair, maybe sporty, but it don't feel like 180HP to me nor 160. I installed on of those Equus turbo gauges, the one with the pressure hose attached to it. On that it makes 0.4 bar boost pressure at most. That's manifold pressure. I've checked throttle body microswitches, with an ohms meter and filler gauges, or how do you call those things. Anyways that should be okay. My air mass meter was sticky, but i've cleaned it and it's now okay. Also tested ohms according to manual, the thing seems okay to me. Because the engine is in the back of a Matra Murena, i've placed the intercooler above the gearbox at the side of the cylinderhead with a blower on it. The air lines then also had to be custom build. The inner diameter of my self made connections are larger then that of the original aluminum stuff. Also the distances between the connection points have therefor slightly increased. Dono if that has effect. Bit more lag i guess... It always starts easy. Response to the throttle, is smooth. It doesn't stall or anything. It revs like baby i'm ready to go, but then falls back into this annoying i'm going slightly mad idle. Maybe it's worthy to add that it feels to me like all power is under the first half stroke of the gas pedal and that pushing it deeper seems to make barely any diff... Quote Link to comment Share on other sites More sharing options...
Guest OB6D Posted August 4, 2006 Report Share Posted August 4, 2006 Seems i posted it twice, dono how that happened. Sorry. Quote Link to comment Share on other sites More sharing options...
Guest adegnes Posted September 6, 2006 Report Share Posted September 6, 2006 It may help to adjust the ignition timing... had the same problem, turned out my timing was way off! Quote Link to comment Share on other sites More sharing options...
Metako Posted September 16, 2006 Report Share Posted September 16, 2006 The engine is also not to eager to run above 4000 rpm. this sounds like it might be a leak in an intercooler hose (as well as the low boost symptom). Have you checked all your hose clamps for tightness? I had a similar problem recently and discovered a loose clamp. May also be O2 sensor problem. Disconnect sensor and if problem goes away then you've found the problem. Quote Link to comment Share on other sites More sharing options...
Guest Posted December 9, 2006 Report Share Posted December 9, 2006 this sounds like it might be a leak in an intercooler hose (as well as the low boost symptom). Have you checked all your hose clamps for tightness? I had a similar problem recently and discovered a loose clamp. May also be O2 sensor problem. Disconnect sensor and if problem goes away then you've found the problem. Quote Link to comment Share on other sites More sharing options...
Guest Posted December 9, 2006 Report Share Posted December 9, 2006 Same category of running problems as those already posted / disguised as a fuel supply/electrical issue? The [88] N9tea fires up readily and runs ok at idle, but when driving and upon acceleration, she starts cut out badly... then return to normal at idle. No LED codes are flashing [indicator light operational]. Fuel filter, pump and tachymetric relay have been replaced. Both fuel and ignition relays seem ok [i.e to run cool] and all wiring, connectors and grounds have been checked/cleaned. However, the air intake boot was patched up -previously- w ducttape. This is the one item I have not touched/replaced for fear of it coming apart completely. The symptoms seems to have gotten worse the more the car was driven... [150 miles; since revived from years of languishing in a field]. This makes me suspect the air intake system and -boot [ducttape melting from the exhaust heat?]. Any insights are welcome for repair of a cracked air intake boot -better yet- a source for a new one? Quote Link to comment Share on other sites More sharing options...
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