Hello all I'm a newbie to the site. Wanted to get some opinions on why I'm lacking power in my 89 ef. Just bought the car recently its got a 95 obd1 ls swap with a gsr tranny. It seems to lack power in low rpms as compared to my 92 ls which has almost 300,000 miles on it. It also surges at idle. It had anew distributor on it when i got it, an a (ghetto) wire tuck. Thought maybe it could be a timing issue, but just wanted to get some opinions so that when I get time i can actually try an fix all possible issues. Any help is greatly appreciated an I will listen to all advice.

 

Any check engine lights?

 

I've seen it come on once but it went right back off.

 

ecu threw a code 43 which I believe is the fuel supply system


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also like I said the motor is from a 95 ls but the ecu is a pr4 obd0 ecu. an the intake manifold has a plate covering a hole on the motor side of the mani where a sensor would have went. any idea if that affects anything


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Could you post some pics?

 

I can in the morning have to figure out how but I will. also the distributor has a wire running out of it an through the firewall not sure where its running to yet bit ill post a pic of that too. an also it has a single wire o2 sensor


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It's single wire because it's running a obd0 pr4. Which color wire is it connected to on the dizzy?

 

its running to the inside of the dizzy ill take the cap off an check where its running to tomorrow also


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it also has trouble starting, it cranks over about 10 times before it fires up


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do you have an aftermarket tachometer (rpm or rev gauge) installed? that is probably what that single wire is.

the hard starting is most likely a bad main relay, easy to repair or replace.

your belt timing could be off on one cam, causing the lack of power feeling in the low end area.

the plate covering a hole on your intake manifold could be causing a vacuum leak which would make your idle surge, more than likely though your FITV is leaking because it has backed out... assuming you have the matching obd1 intake manifold your FITV (Fast Idle Thermal Valve) will be bolted to the bottom of your Throttle Body. the pix are dead, but this thread says how to fix it. super easy to do:
https://honda-tech.com/forums/tech-misc-15/surging-idle-how-tech-article-56k-beware-1003988/

 

ill check all that out an get some pics today thanks for the help ill keep ya posted


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for some reason it won't let me post any attachments


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ok so the intake is an obd0 not an obd1 an I didn't see the fitv under the throttle body.


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when i traded for the car the boy said he had to replace the motor an he used a 95 ls in it I think he just used all the obd0 parts so he didn't have to convert it


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so I think my fpr is to blame for my poor performance can anybody tell me a good aftermarket adjustable fpr for the obd0 ls motor


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ok so I know everybodys probably gettin annoyed with me but I've also noticed that sometimes when I go wot it bogs down like its gonna die then it picks right back up again any idea what that could be. an it seems to be running really rich


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Doe you have intake air temperature sensor on there?

 

yes it does have one


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ok so I checked all the vacuum lines it doesn't have the evap canister an the vacuum on the fpr is running straight to the manifold could that be the cause of the code 43


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so does anybody know where the vacuum lines should run if the evap can an fuel regulator solenoid were deleted during the wire tuck


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for pics use photo bucket or flikr or something like that.

once you post pics of your intake manifold we can tell you where to run your vacuum lines.