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Finished bolting in the motor from the 1990 into my 88. Turns over fine , but not the slightest indication that it wants to fire. Have fuel to cylinders as well as spark. Same no matter which computer I use. Anyone have any Thoughts?
Thanks, Ferg
was the distributor removed then replaced back in? If so did you place it back in on top dead center(correct position). Plug wires on right spots? Timing in the right position? just some of the obvious things to check first before you get technical on it.
Thanks for feedback. Distributor never touched. In same position as when engine was running. Triple checked plug wires. all where they should be. As long as distributor position did not change, could timing be off ? Don't have a timing light avail at the moment. Wont be able to get to it until next week, but will check it out. Thanks again for your help.
Ferg
Is the spark strong enough to fire? set the engine at TDC on # 1 and line the rotor up so it is faceing the # 1 cyclender and that should be enough to start it.
I guess spark is strong enough. Easy enough to see. Will try your suggestion. Thanks, ferg
Originally Posted by 80`F-150
Is the spark strong enough to fire? set the engine at TDC on # 1 and line the rotor up so it is faceing the # 1 cyclender and that should be enough to start it.
Used the wiring harness off of the 88. Harness off 90 a bit different as far as major connections and routing through engine compartment, but every connection off 88 harness has a home. Ie plugged into all fuel injectors and sensors. Plug in spots on 90 same as 88. Also used upper intake manifold off 88 with all sensors attached.
Thanks, Ferg
Originally Posted by oppy
Did you use the engine wiring harness from the '90? Were you able to plug everything back together?
Have you tried shooting a little starting fluid down the intake? If it fires then maybe it's a fuel problem. I know you said you had fuel at the cylinders but is it enough? If it doesn't fire you know it would be electrical or timimg.
have someone turn the key on and see if the pump in the tank is whirring. then under the driver side door is the HP pump and see if that one is working. my HP pump dies sparaticly.
Try with some ether down the intake if no go then start looking at your ignition system. (was the 90 running when pulled?)
Did you replace the rotor, cover & new wires when you installed the engine?
Did you also replace the Secondary Cylinder in the tranny on your 5 speed? when you had the engine out? as it will start experincing problems with it leaking cause you had the tranny & engine disconnected.
Sorry for late response to feedback, but was out of town. Did try the ether in upper air intake with no results. Engine has new cap, rotor, plugs, and plug wires and was running when wrecked. I am going to tow it to shop this Thursday and have diagnostics done, timing check etc. Thanks for all the help. Will post results of check.
Regards, Ferg
If you have spark, then I would have to assume the computer is fine. Though I would still check the relay and fuse for the computer. If you have a TFI module, replace it. It is only $30.00 and cheaper then a tow. Make sure all teh wires at the TFI module harness are tight.
I have not followed the whole install, what I would check is everything on the pass. fender. The relays, MAP sensor, etc. The relays are different colors (brown, green, etc.) Make sure you did not mix the harness relay conenctors up.
Since you have had the fuel system disconnected (even though you have fuel), I would turn the key to the on position at least three times before trying to start it. Then crank it in short bursts three times, then crank it long to see if it starts. That has worked for me.
Thanks rebocardo for your thoughts. Already did the fuel priming deal and can find no problems with electrical connects. Had thought about TFI. Going to have timing checked. If okay, thinking of installing distributor from 88 with TFI that I know is good.
Regards, T.Ferg
Is that the part on the fenderwell with coil wire from distributor?
Thanks, Ferg
No the part I was referring too is in the distributor. Some people call it a coil pick and others call it stator/hall device. My 88 Had fire sometimes and other times it didn't. Drove me crazy trying to figure out what it was. Checked all the relays, wires and coil. Finally replaced the Hall device and took care of all of my problems. I bought a spark tester. It really helped me out. It is a device that you can clamp to a ground and then put a spark plug wire on. It has an adjustable gap on it. It just made it easier to see if I had spark and if the spark was hot enough.
The thing on the fender is the coil. It can be checked by a parts store or if you have a manual and ohms meter you can check it yourself. Also the red wire that goes into it is the power wire. You should have 12 volts to it with the key on. If not start checking relays. Also make sure the coil has good ground. It has a separate ground wire because of the plastic fender wells. Sometimes where the ground wire attaches becomes corroded. But the coil and stuff should be ok if you haven't changed it when you swapped engines. Never hurts to check though.
Last edited by 97Centurion; Jun 15, 2005 at 10:33 PM.
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