chrishill 0 Posted July 21, 2004 This only started happening a few days ago, and seems worse when its wet, but that might be coincidence... First turn of the key from cold, it coughs and splutters, revs are unstable and around the 200/300 mark then it dies. turn the key again and it fires up and idles at just over 1000rpm (which is about right IIRC?) for the first minute or so of driving the car struggles, almost stalling, then seems to pick up and be totally fine! Could all this be down to the ISV? if so, is it easy to replace for a total novice? anyone done a how-to? Quote Share this post Link to post Share on other sites
kvwloon 0 Posted July 21, 2004 I'm no expert, but I would be looking at the 'fifth injector' which injects a bit more juice during start up from cold. If it is the ISV it's a doddle to change, might be worth cleaning it internally first though as it gets a bit guncky over time. Failing that I would be looking for air leaks, especially at the pipe that goes to the top right (as you face the engine) of the cam cover. As i say I'm no expert on the engine, so can't go in to too much detail on the above points, but from a fair few years of 16v ownership that's what I would be looking at, followed by the electrical side of things, leads, rotor arm etc.... hope you get it sorted. Quote Share this post Link to post Share on other sites
aide 0 Posted July 21, 2004 I'm no exper either :D But recommend start with connection on blue pin connector which is cold start valve, this is located below the ISV, then move onto the ISV which received signal from blue pin connector as kvwloon suggests. ISV is easy to change but ain't cheap - though there is a character on ebay selling em cheap got number if you need. Just noticed you say it happens when wet, is water getting into induction system somehow? Is your airbox drilled? Water would definitely cause it to struggle in manner described! Other than that you can reeset your idle timing, do this by running car till warm, and then disconnecting black/ red (i think) connector at coil, adjust idle and then reconnect. Other possibility check your fuel/ air mixture, should be 2 - mine had real problems starting when my mixture was way out, but would run fine once fired. Procedures for doing above are in haynes manual - golf/ jetta 16v, get em of volkswagen technical site :D Quote Share this post Link to post Share on other sites
