tybaldo Posted March 11, 2007 Share Posted March 11, 2007 hey... i got a problem after i finish rebuilding my engine a put it back in the car, i plug every connector where they suppouse yo go, i have spark, distributor is timed, got fuel, and im getting power to all my electronics. What could be the problem. engine crank and cranks but no start. Please help. i need to get it running before the end of this month Quote Link to comment Share on other sites More sharing options...
roger.svoboda Posted March 11, 2007 Share Posted March 11, 2007 try disconnecting the fuel pump. hold the throttle wide open and see if she fires. let it crank a good bit. I had the same problem and it was basically flooded from putting fuel in. Do you smell gas at the tail pipe? spent many an hour checking spark, timing fuel pressure etc. Wide open throttle no fuel pump and she finally cranked. If you get it to start do it again until you don't get any fire then reconnect fuel pump and she should run. If you get no fire this way then recheck timing, fuel pressure, plug wires. pull all the plugs lay then on the block and see it they are all firing nice fat blue spark. Quote Link to comment Share on other sites More sharing options...
tybaldo Posted March 11, 2007 Author Share Posted March 11, 2007 thnax i ll try that and i ll let u know what happen. yes its smell like fuel on the tail pipe. i already check my timing and my spark plug and they are firing nice and strong. Quote Link to comment Share on other sites More sharing options...
tybaldo Posted March 12, 2007 Author Share Posted March 12, 2007 i try what you told me but still no start. any other suggestion!!! Quote Link to comment Share on other sites More sharing options...
roger.svoboda Posted March 13, 2007 Share Posted March 13, 2007 If you are sure you have spark and fuel then check the air supplly you need those three things to make fire. If sparking at wrong time then you don't get fire. Did you try cranking a long time with no fuel and throttle wide open. I don't mean two or three turns let it go 20 seconds or so. Look at where TDC is on crank pulley. Look at where rotor in dizzy is pointing. Should point to a mark on the dizzy body. Pull oil cap and look at #1 cylinder cam lobes they should both be pointing up and out kinda like bunny ears. You can also get a TDC on the crank pulley where the #1 cyl is actually on exhaust stroke finish. Remember crank speed is twice cam speed. Check the firing order in the fsm. something wrong with timing if all above correct and no fire. Quote Link to comment Share on other sites More sharing options...
tybaldo Posted March 16, 2007 Author Share Posted March 16, 2007 do you mean the air regulator, because i removed it. seconde my dizzy is a 81 turbo. the other night i toke the front cover out and adjust the timing and now i got backfire cpming from the emergency relief valve. how come!!!! don't knoiw what to do . Quote Link to comment Share on other sites More sharing options...
roger.svoboda Posted March 16, 2007 Share Posted March 16, 2007 81 dizzy takes the firing signal off the gear looking thing by the crank pulley. If this is not in correct place then your timing is off. You need to look at fsm and figure this out. too complicated to explain here. timing definitely off if you are getting backfire. she is firing at the wrong place in the cycle. Quote Link to comment Share on other sites More sharing options...
JSM Posted March 16, 2007 Share Posted March 16, 2007 You sure you didn't cross any of the spark plug wires? Quote Link to comment Share on other sites More sharing options...
tybaldo Posted March 18, 2007 Author Share Posted March 18, 2007 finally got it running. the distributor shaft was out of place, but now she's loping dont know why, i already readjust the valve nad retorque the head. any inputs? Quote Link to comment Share on other sites More sharing options...
240Z_Master Posted March 18, 2007 Share Posted March 18, 2007 finally got it running. the distributor shaft was out of place, but now she's loping dont know why, i already readjust the valve nad retorque the head. any inputs? Sounds like timing. Quote Link to comment Share on other sites More sharing options...
tybaldo Posted March 26, 2007 Author Share Posted March 26, 2007 my cam was one tooth out of time. but it still have a like missfire in idle. same missfire i have before i rebuild the engine. what can it be ? Quote Link to comment Share on other sites More sharing options...
Daeron Posted March 26, 2007 Share Posted March 26, 2007 my cam was one tooth out of time. but it still have a like missfire in idle. same missfire i have before i rebuild the engine. what can it be ? Poor CTS connection perhaps? Go back to basics, go here and download the "EFI Bible" and perform ALL the tests involved, and find your issue. I think you have established that it wasn't a motor issue. Quote Link to comment Share on other sites More sharing options...
81280zx Posted March 26, 2007 Share Posted March 26, 2007 i just rebuilt mine also and it wouldnt start then when it did the car idled hard and miss fired found out that the timming was way off and the tps was gone on it. I would double check your timming on it just to be safe and u not looking at a fadded line like i was. Quote Link to comment Share on other sites More sharing options...
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