Hi, I have a 92 RS with 305 TBI completely stock, until now. This weekend i ripped it all down in order to put in a new cam timing chain, and roller rockers. I put it all back together and when i tried to start it it sounded like it was firing on #2 cyl. so i pulled the distributor and put #1 on TDC and reinstalled distributor. Car was backfiring through thottle body and shooting out gas. it fired up and ran for about a minute and the whole time it was blowing air and fuel out of the throttle body and it sounded like ****. well anyway after about a minute it died and now it will not start. It is not blowing crap out of the T.B. like it was before either it just keeps cranking. Now if it ran that means the distibutor in in the right spot, correct? it seems to me that it's not getting fuel but when i unscrewed the fuel line from the throttle body there was fuel there. This is my first TBI engine build so not really sure of what's going on. How can i check for fuel going into the intake? when i give it throttle i see no fuel squirting into the intake. Thanks in advance for any help.

 

you miss aligned the crank and cam gears then screwed with the timing.. just cause it fired once does not by any means imply that the timing is set correctly especially now as you had not done anything to affect the timing in the first place...


So start by puting your dist. back in the correct place by removing it and removing the timing chain then align the dots on the cam and crank gear to 6 and 12 o'clock respectively then re install the timing chain and your distributer with the rotor pointing as close the the #6 plug wire as possible

 

I second to this as well. Make sure your crank and can are in synch.! Then more to the distributor and TDC. Then carefully put everything together. Take your time, and double check your work!

 

Hey guys, thanks for the help. Not to second guess anyone but i am sure that my timing chain and cam are in sync with the crank. The crank sprocket was at 12 o' clock and the cam sprocket at 6 o' clock. they lined up perfect with #1 cyl on TDC. Would it be possible for the motor to actually run if the timing chain was mis aligned? Anyway this is the first non points style dist. i have used so i'm going to try to put it back in with the rotor pointing to #6 wire because i had it pointing to #1. Thanks for the help.

 

yes it would be possible to run the motor.
That alignment is only a suggestion but after you set the dist back to its correct position then you can start looking at the rockers which are probably also to tight...
you should back them off and re tighten them so that they just dont allow any movement up or down of the pushrod dont try turning them setting them like that is a art not a science...

Are those roller rockers self aligning or guide plates?

 

= #6 firing. Of course it's also #1 TDC; it's just the instance of TDC where the exhaust valve is just closing and the intake valve is just opening.

Both dots @ 12:00 = #1 firing, and #6 valves rocking.

Put the engine back to the "dot-to-dot" position; then rotate the crank about 350° (10° less than 1 complete revolution. Remove the dist, then drop it back in such that the rotor points at the #1 plug wire (the one on the very front of the dist, just to the driver's side of straight ahead). Rotate the dist body such that the star wheel teeth exactly align.

Then finish re-assembling the engine, fill it with fluids, and shut the hood. Reach in the window and crank it up. After it has run for a minute or 2 and evened itself out, open the hood and set the ignition timing to 6° BTDC or whatever.

 

2 things. first. with regards to timing: theres a tan/black(?) wire coming off the back of the ignition control module to the ECM. theres a connector on this wire that needs to be disconnected when setting timing.

second: maybe i'm a little different than everybody else, whose to say. however, any time ive ever done a cam change or done anything that relates to distributor position my procedure is: set #1 to TDC, stab the distributor - get the rotor approximately where it needs to be. start the car and immediately check/set the timing.

i agree with SpitotRs305 about the rockers. theyre hydraulic lifters so your lash point is 0.
easy way to do it with both valve covers off. work with your companion cylinders and knock em out 2 at a time. the companion cylinders are 1 - 6, 8 - 5, 4 - 7, 3 - 2. back the nuts off the rockers till you got some slop in the rocker arm. wiggle the rocker arm and slowly crank down on the nut till you take all the play out of it, then take it another 1/8 to 1/4 turn past that. do this first, then mess with the timing.



smith