TPITuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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I just got done replacing all the plugs, wires, dist. cap and rotor and now the engine won't fire. All I get is some popping and an occasional loud bang. I check plug 1 for spark and didn't get anything. Would there be no spark if the rotor is 180 deg off? It's my '85 TPI Z28. Thanks
__________________ 85 Z28 Camaro-305 TPI, 700R4, Hypertech chip, Removed AIR Pump, 3 inch exhaust, custom ram air induction
Is the firing order back on right? how about the rotor?is it seated right? is the button in the center of the cap making contact with the rotor? is the coil plugged in? how bout your spark plugs, did ja gap them right?
Double checked the firing order a few times, rotor is seated right, the button is making good contact with the rotor, coil is plugged in, gapped spark plugs at .035. The only thing I'm not sure about is if the rotor is in the right position. The car was running when I took everything apart.
__________________ 85 Z28 Camaro-305 TPI, 700R4, Hypertech chip, Removed AIR Pump, 3 inch exhaust, custom ram air induction
Double checked the firing order a few times, rotor is seated right, the button is making good contact with the rotor, coil is plugged in, gapped spark plugs at .035. The only thing I'm not sure about is if the rotor is in the right position. The car was running when I took everything apart.
Try and disconnect the battery maybe the computer has a glitch. That happened to me one time. i disconnected the battery for a bout 20m minutes after that it fired right back up. just a suggestion
__________________ 1986 Camaro Iroc-Z 350 TPI Corvette motor 700r4 trans, BMR strut tower brace,BMR adj.Panhard Rod,Energy Sway Bar links,Eibach Pro Kit,J&M street lower control arms,Accel Distributer,wires.Blacked out all lights.5% Limo tint all the way around.
Ok, unhooked battery and rechecked the firing order. Took coil off and checked the wires, put coil back on and checked firing order again. Hooked battery back up and gave it a try. Still nothing. Checked for spark on all eight cylinders and all are getting good spark. So, checked fuel pressure, 38 psi. Still no fire, just a slight hesitation and occasional backfire. Does anyone have a firing order diagram for TPI? I thought it was the same as any other small block chevy. Any other idea's?
__________________ 85 Z28 Camaro-305 TPI, 700R4, Hypertech chip, Removed AIR Pump, 3 inch exhaust, custom ram air induction
Should be the same as every other SBC. Sounds like your firing order is off or rotated. Pull #1 plug, rotate your engine til its on TDC COMPRESSION stroke. and then take the dist. cap off and make sure the rotor is pointing to the wire that goes to #1 spark plug. Rotor should only go on one way...But your condition sounds like when the distributor is 180 off...
he probably put the wires onto the distributor counter clockwise as apposed to clockwise OR got the wrong point on the distributor as number 1 and consequently set the whole thing off
he probably put the wires onto the distributor counter clockwise as apposed to clockwise OR got the wrong point on the distributor as number and consequently set the whole thing off
he probably put the wires onto the distributor counter clockwise as apposed to clockwise OR got the wrong point on the distributor as number 1 and consequently set the whole thing off
When you replaced the wires, did you change them one at a time? Or did you pull them all off and then replace?
If you did them one at a time, and did not remove the distributor, that leads me to the rotor.
You can't install the rotor improperly and still get the cap on right, so at this point, I would take the rotor out, and check it for a carbon burn. Occasionally, a defect in the rotor allows the spark to burn through to ground, and this will result in symptoms like yours. If this has happened, you will see a black burn spot near the center of the rotor.
