engine not starting
engine not starting
hi, i hope that you may help me. I have a 97 240sx and was installing a msd6al on it. I messed up the install and blew a fusible link. I replaced itand decided to put back the stock wires. I did extend the stock wires with14 gauge wires..much thicker..but now the car won't start..it tries to..butslows down..like gugh..gugh.........gugh..gugh.. and so on..i did a batteryvoltage test..and when i tried to start it...it drops to 9.5 or so..i'm notsure what could have been affected when i blew that fuse..the computer hasno check engine light or and problems whatsoever..i'm wondering if thecircuitry of the starter could have been messed up from that surge andblowing the fusible link...battter is full..can't pop start the car..don'tknow what to do..except look at the starter..and it started perfectly beforethe msd..and i have reset the comp already many times..thanks for youtime
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yellow_jacket
- Posts: 1355
- Joined: Mon Jan 13, 2003 4:43 pm
- Car: 95 240sx
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yellow_jacket
- Posts: 1355
- Joined: Mon Jan 13, 2003 4:43 pm
- Car: 95 240sx
You need to check and see if you are getting spark, fuel pressure, and injector pulse. From there you will be able to continue tracking down the problem. I am not real familiar with the ingnition system you were installing so I don't really know what you could possibly have fried. Just start by figuring out if you have fuel, fire, and pulse.
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yellow_jacket
- Posts: 1355
- Joined: Mon Jan 13, 2003 4:43 pm
- Car: 95 240sx
to check injector pulse you need a noid light. Autozone or NAPA might sell you one or let you borrow one. Fuel pressure you need a fuel pressure gauge with the proper adapter to tap into your fuel system somewhere(you can make them cheaply) You can also just try listening to see if you hear the fuel pump coming on or you can check and see if it is getting power(I think there is even an acess panel in the back somewhere). Of course, if you took the distributor out, make you sure don't have it 180 off.
well..the distributor was not taken out..i'm not sure why it would be a fuel problem if most likely i shorted something out. because I just dealt with electrical. the car is a 97 and has never had a problem with anything else. what is the difference between cranking and turning over? the engine like..shakes twice..then kinda dies..then tries to start..and shakes a little..then dies..so..not sure dudes:(
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matt240det
- Posts: 126
- Joined: Fri Aug 30, 2002 4:35 pm
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yellow_jacket
- Posts: 1355
- Joined: Mon Jan 13, 2003 4:43 pm
- Car: 95 240sx
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matt240det
- Posts: 126
- Joined: Fri Aug 30, 2002 4:35 pm
although if it were flodded it would continue to crank, just not start, if that doesn't work, perhaps check the wiring of your ignition, there are just so many variables, it's difficult to diagnose a no start problem over the net, all i can do is offer some suggestions that might work, or be completly off, but i'm just trying to help 
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yellow_jacket
- Posts: 1355
- Joined: Mon Jan 13, 2003 4:43 pm
- Car: 95 240sx
I thought the car continued to turn over but just wouldn't start?(meaning that the crank is still rotating but the car doesn't start running) If it stops turning over, that is a whole nother ballgame. Another thing, where do the new battery cables come into all this? are you sure that you hooked up all of your leads when you replaced the cables?
yes..everything is connected back fine..just two wires..going to try to check fuel pressure...but i'm wondering why fuel would have anything to do with installing a ignition. could my ignition relay's gone bad? sometimes a little smoke will come out of the exhaust side of the engine when i try starting it for a awhile.i mean..the engine shakes to try to start..the normal one..left to right kinda movement..it seems like it wants to turn it over..could i have blown a relay? is it possible to blow one?
is the smoke from the exhaust ?? or is it from the engine Ground ?!?!? im thinking its your engine ground wire smoking which means the ground is bad and building up too much resitence and the car will not want to start with a bad ground,... check the connector for melted plastic. then replace the shotty stock engine ground with a better one!!! every one wther or not you have this problemn should replace your engine ground... youll have a better running motor if you do !! !
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yellow_jacket
- Posts: 1355
- Joined: Mon Jan 13, 2003 4:43 pm
- Car: 95 240sx
When i relocated my battery to the back, i removed my engine ground. It still started without this. I'm wondering if my starter would be faulty.the fact that I can't manually start the car leads me to the starter, because I had no fuel problems before..the car only has like 56000 miles.so..could the starter get "shorted" out when i shorted that fusible link?
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yellow_jacket
- Posts: 1355
- Joined: Mon Jan 13, 2003 4:43 pm
- Car: 95 240sx
Are your plugs all wet? In other words is the car flooding? Also you took off the ground to the motor? And then you ran the car without it? Are you talking about a ground wire that runs from the valve cover gasket to the firewall or something similar to that. BTW, if you can't get the car to start by pushstarting it or dragging it behind another car then it is not the starter. The starters only job is to turn the motor over at a sufficient pace to start the car(~250 rpms). The reason you could have a fuel problem are various. When you short anything bad enough to take out the fusible link it is a very bad thing. Especially on computerized vehicles.
great..i realize that it is a bad thing to short something out though..but i did try to start the car in 1st gear..the nissan service department said not to do it in first..and to do it in second. that's why it wouldn't start. i'll try it..but otherwise..the fusible link i blew had to do with the ignition system. so..the only plausable thing i can say is that it has to do with anything that has to do with the ignition.what do you think?
basically, i reversed the wires which sent that powerful surge throughout my car...and blew the fusible link. No all i'm trying to do is go along the ignition system..because that's all i touched..and that's all "should" technically be in the problem..the battery, fuses, relays, starter, coil. i think..thats it..so..what do you guys think..will a surge like that mess up a starter?
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yellow_jacket
- Posts: 1355
- Joined: Mon Jan 13, 2003 4:43 pm
- Car: 95 240sx
Very unlikely that the starter is damaged considering the motor is turning over at a decent pace(from what I understand) It really sounds like you have either a lack of fuel or a no spark/weak spark condition. Unfortunately, the weak spark condition will be horrible to track down. Try starting it. Then remove the fuel pump relay and try starting it again. Did it start to chug and then run? Or try shooting carb cleaner into the intake manifold as someone tries to start the car. Then let me know what it did. Also just because the fusible link blew for the ignition doesn't mean it didn't screw a bunch of other stuff up. Computer chips can be very sensitive. Have you checked to see if you are actually getting a spark yet? And the fact that you can't push start the car means that it is not the starter. Honestly, You may be better off taking it to a mechanic and having it diagnosed and then repairing it yourself it that is what you want to do.