Shanrad Posted August 25, 2016 Share Posted August 25, 2016 Hi i have a 1994 3.9 discovery Since putting new gaskets in ive had nothing but rough idle no power and black smoke. It has new coil,leads,plugs and stepper motor.we have done a compression test and all is good. One thing i did notice is it idles a little better when i disconnect the MAF plug.we also checked the spark and timimg. Any help would be absolutely awesome Quote Link to comment Share on other sites More sharing options...
Disco-Ron Posted August 26, 2016 Share Posted August 26, 2016 Double triple and quadruple check that the plug leads are correct. ... it's very easy to get3/5 and 4/6 wrong. .. Quote Link to comment Share on other sites More sharing options...
Shanrad Posted August 27, 2016 Author Share Posted August 27, 2016 Ive checked all of them and everything is in order Quote Link to comment Share on other sites More sharing options...
Quagmire Posted August 30, 2016 Share Posted August 30, 2016 Black smoke is probably too much fuel, does the coolant temp sensor check out ok? Quote Link to comment Share on other sites More sharing options...
Shanrad Posted September 5, 2016 Author Share Posted September 5, 2016 How do i check this? Once again it's back to not starting. 1 month of no idea whats happening ? ive just installed a new distributor and ignition module today with no change. When i done the head gaskets in removed the gas set up. Could this have upset anything? I was told that it wouldnt but iam now second guessing that theory Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted September 5, 2016 Share Posted September 5, 2016 Multimeter and the diagnostics manual, which are in the tech archive. Quote Link to comment Share on other sites More sharing options...
Shanrad Posted September 5, 2016 Author Share Posted September 5, 2016 The plug wires have some loose and damaged on the CTS. It has to wires..green and red one. Any idea if it matters which way the wires go in? Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted September 5, 2016 Share Posted September 5, 2016 No, it doesn't matter, it is just a temperature dependant resistor Sounds like you may well have found the issue.... Quote Link to comment Share on other sites More sharing options...
Shanrad Posted September 5, 2016 Author Share Posted September 5, 2016 Wasnt the issue Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted September 5, 2016 Share Posted September 5, 2016 All plugged in the correct place and whatnot? If the ECU is throwing tonnes of fuel in it's likely reading one or more of: - Engine too cold (temp sensor) - Air too cold (sensor in MAF) - Too much air (MAF itself) Could possibly be affected by throttle position sensor too. I'd super double check all wiring, plugs, hoses, etc. if it was fine before you disturbed it. Quote Link to comment Share on other sites More sharing options...
Shanrad Posted September 5, 2016 Author Share Posted September 5, 2016 Its definitely putting a lot of fuel in.I was going to the wreckers tomorrow to try get a maf and hopefully a throttle position sensor Quote Link to comment Share on other sites More sharing options...
Shanrad Posted September 5, 2016 Author Share Posted September 5, 2016 Thanks for the help guys. Ill keep you posted Quote Link to comment Share on other sites More sharing options...
Ally V8 Posted September 5, 2016 Share Posted September 5, 2016 Make sure the plugs for the coolant temp sensor and fuel temp sensor are not swopped around, they run very rich when this is done,seen it a few times. Quote Link to comment Share on other sites More sharing options...
Shanrad Posted September 7, 2016 Author Share Posted September 7, 2016 Checked that mate..shes all good. Anybody know first hand how to check the maf reading with a multimeter? Iam unsure of how to use this device correctly and what settings to have it on. Ive put the red lead into the vma socket and the black into the one that has no label and turned it onto v 20 setting. I then turned the key on,put the red into 35 on the ecu plug and earthed the black but its reading 11.79 which tells me its definitely not right lol. Any help would be awesome. Iam still leaning this side of the discovery and enjoy learning. Cheers Quote Link to comment Share on other sites More sharing options...
toastkid Posted September 7, 2016 Share Posted September 7, 2016 Perhaps give this a try: https://www.2carpros.com/questions/land-rover-discovery-2-2001-land-rover-discovery-2-maf If the car runs better with the MAF unplugged then I'd get a new one. Genuine only - the cheap ones are generally pants. Quote Link to comment Share on other sites More sharing options...
Shanrad Posted September 8, 2016 Author Share Posted September 8, 2016 The link is for a discovery 2 and mine is a 1. I cant get the car started at all anymore. Been like this for a week now. Its got me stuffed as to what is stopping it Quote Link to comment Share on other sites More sharing options...
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