so what would cause fuel to spray out of the TBI . I lined up the harmonic balancer with the timing plate at 0 brought the #1 piston to t.d.c and the rotor is pointing #1 cylinder and still no start .is it possible that i crossed the fuel return line with the inlet on the TBI unit
2007-03-28 17:48:28 · 3 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
It sprays out of the injector And leaks out the right hand side fuel line that might be just the o ring ,how to make sure the piston is on the compression stroke? I swapped engines 87 454 to a 90 the only difference that i noted was the TBI so i used my old one
2007-03-28 18:28:03 · update #1
I suppose it is possible that you forced the lines to go on backward. How different were the throttle bodies? Does it spray out of the injectors any time there is pressure, or only when the key is on, or only when cranking, is it a cone shaped spray, continuous or pulses?
The only sure way to check for TDC without removing the valve cover, is to take the #1 plug out and have someone briefly click the starter while you block the spark plug hole with your finger. Have them turn it a few revolutions in short clicks so you can be sure you aren't mistaking the compression stroke for the exhaust stroke. The compression stroke will push your finger off the hole to let the pressure escape. When you are sure by having seen the mark pass the TDC indicator a few times, have your assistant do even shorter clicks, and try to bump it right to TDC. You may want to have your assistant remove the key and show it to you so you can safely move it the last inch or so by hand. Since the outer ring on those harmonic balancers can slip and rotate out of alignment, now would be a good time to stick a wooden dowel in the cylinder and hold it against the piston, then have an assistant turn the crankshaft back and forth a few degrees to make sure the piston is really at the top of the bore. If it really is at the top, and the piston forced the pressure out on the way to TDC, then your engine is in position. Make sure the distributor is pointing at #1 and the eight points on the distributor pickup are pointed at each other. This will give you close enough timing to get it started, and time it with a light.
2007-03-28 17:56:21 · answer #1 · answered by BFH 6 · 0⤊ 0⤋
The pressure and return fuel lines are two different sizes, but the fitting are the same thread size. If you connected the pressure to the return side, you will damage the pressure regulator, and yes, conceivably cause fuel to spray.
2007-03-28 18:35:53 · answer #2 · answered by Ironhand 6 · 0⤊ 0⤋
.Just because you lined up all your marks, no1 piston may be at tdc but on the exhaust stroke. your dist could be out 180. If you crossed the fuel lines it wouldn`t spray, and you would have to bend the lines way out of wack
2007-03-28 18:03:05 · answer #3 · answered by Anonymous · 0⤊ 0⤋