i am aware i have a vaccum leak but i believe i have some other issues as well. note that there is no exhaust past the y-pipe but usually these try to idle right? im trying to narrow it down if the csi is the only working injector or if theres something else working as well https://youtube.com/shorts/...?si=yALqP7odOq6EJcsI
It wouldn't run at all on just the CSI. Check the continuity of the two injector fuses.
i have and they are putting power across them. im wondering if the compression really is just that bad and using some stale gas just kinda screws me since i dont think it can add enough through the standard enrichment im sure the broken egr tube i crushed flat is also still leaking despite being flattened and folded over a few times
tried the gas from my s10 and it still wont idle and it also is refusing to talk to my tech (1?) snap on red brick scanner that can speak to other 87s and 88s so idk. could be a ecu error or maybe the ground is still broke
i have and they are putting power across them. im wondering if the compression really is just that bad and using some stale gas just kinda screws me since i dont think it can add enough through the standard enrichment im sure the broken egr tube i crushed flat is also still leaking despite being flattened and folded over a few times
Chances are there vacuum leak is the problem. Make absolutely sure the egr tube is capped if removed. Also check the plastic vacuum lines and connectors that run under the intake manifold. Unless they have been replaced, they are now almost 40-years old. I had a similar issue on my '86 SE V-6. I found a lead under the manifold. You can get stainless steel vacuum lines from The Fiero Store but they were pricey and I wanted it fixed immediately. I put a piece of adhesive-lined heat shrink tubing on the line and used a blow dryer to shrink the tubing. I also replaced the rubber elbows when I could find them or used a piece of vacuum line to replicate the function. Problem solved.
Bear in mind, this worked for me but may not work for you but that's where I would start.
solution was simple. throw away the engine (jk) every single part of the feed line is pin holed and shitty and was repaired with carburetor fuel line at some point that was brittle like glass and sounded like it when i hit it with a hammer. i fixed that and then found the little section of metal line right after the fuel filter was full of pin holes and i dont have a spare....yayyyyyy
can i make this flare to just get the thing running at this point. im rather out of patience and money since this is the last thing i dont have a spare for. i tried welding it, took it to a professional and it was even worse than my attempt. no matter what its at least a few drops even after i went back over it. and i REALLY REALLY dont want to spend the 109 dollars plus shipping right now
[This message has been edited by cartercarbaficionado (edited 11-08-2025).]
stole a fuel line off a parts s10 and made it work. no leaks but the engine still wont idle.....i think its a spark issue? its kinda hard to tell without a tester, what would turn the spark off after i let off the key? my guess is ignition switch the fuel pump is also working despite the oil pressure switch being unplugged completely.... no idea how but hey im not gonna question it
stole a fuel line off a parts s10 and made it work. no leaks but the engine still wont idle.....i think its a spark issue? its kinda hard to tell without a tester, what would turn the spark off after i let off the key? my guess is ignition switch the fuel pump is also working despite the oil pressure switch being unplugged completely.... no idea how but hey im not gonna question it
The oil pressure switch is just a backup circuit for the fuel pump relay.....
The ECU (at KEY ON) fires the relay for about 5 seconds to run the fuel pump to build fuel pressure, then turns the relay off. When the ECU sees engine rpm (even cranking rpm), it refires the relay and runs the pump.
[This message has been edited by olejoedad (edited 11-09-2025).]
