Whats up HT.. welp its not very often I post about a problem with my EFs but this one has be stumped.

I did a LS swap on my 89 DX sedan and it started first try. The Fuel pump has been changed

I let her idle until the fans kicked on so it was idling for at least 20 minutes. I then test drove her around the block and went to fill her up with gas a mile from my house.

So after I get gas, I crank her up and head back to the house...This is where the problems began...the car started acting like it was running on only 3 cylinders... kinda sounded like a WRX with an exhaust lol. It would bog then clear up then start bogging again until it just started bogging continuously.

I limp the car home and the engine finally dies in the driveway.

I crack open the dizzy and see the rotor is super loose and the cap is pretty bad. So I think awww this is easy... I go to the auto parts store, and replace both the cap and button. I go to start the car and I hear a loud POP...and then the car just turns over but Car STILL wont start. Just keeps cranking.

I swap out the whole Dizzy with a known working LS dizzy I get from my LS CRX. and SAME thing... a POP when I try to start, then just start cranking over. I hear the fuel pump priming so I know the main relay is good. I know the Dizzy is good.

WTF could it be?! Could a clogged fuel filter cause this? How about timing? Could the T-Belt jump a tooth out of no where?

Im pretty frustrated... im hoping you guys can help me...

 

I'd check the timing, but there's a chance it could be your alternator solenoid valve fuse if any sensors ground it blows it happened to me when I got my a6 in I couldn't figure it out then I remember the plug ripped off my dpfi tandem valve (sensor for dpfi only) and I grabbed it and the wires were melted together lol, but check your belt also one time mine was so loose I drove like a block and it would jump time and die took a chunk out of my number 4 piston lol

 

Yea i checked that fuse last night and it wasnt blown... Im going to check the timing today .. I hope it didnt jump timing and eff something up in the motor...
But what i dont get is when i test drove it the bogging cleared then bogged then cleared again... Like something was getting clogged up... Hmmm

 

Had a similar issue with the a lose distributor rotor... but you already tackled that. Start from the beginning.

Spark?
Fuel?
Air?

 

Thanks for all the help guys, after having fuel, spark, and air... it was Timing. The damn TBELT skipped a bunch of teeth (Really old TBELT I should have changed)

so basically I have 3 bent valves because I didnt take the time to check the TBELT when the motor was out. Ive def learned my lesson!!!

Look at the spring on the right... valve doesnt extend all the way up


Rockers I just grabbed from the valve train.