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mikey bottles · 11-20-2009, 07:01 PM

working with an 89 Civic DX 1.5 (obviously) has new dizzy, plugs, wires, and fuel filter, injectors and O2 sensor, timing is dead on, no CEL. If its in park or neutral it idles with a slight miss, but if you put it in reverse or drive it starts missing real bad at a stop... once you begin to accelerate it misses a little, catches up and runs great once you get driving.. the only thing i can think of thats left would be the fuel pump, head gasket, or possibly ecu? i doubt the head gasket bc its not smoking, its not chewing up coolant, and the oil is very clean, no mixture. should i just fire a fuel pump in there and hope for the best or does someone here have a more definitive way of finding the actual problem? at this point ANY thoughts or suggestions are welcome!

phyregod · 11-20-2009, 07:14 PM

My first guess would be a clogged up / faulty IACV. Take it off and clean it up. DIY cleaning your IACV - Honda Forum / Acura Forum - SuperHonda.com

Being that it idles fairly well, but boggs under load could indicate low compression.. Compression test the motor and post up the numbers.

Are the plugs gapped correctly?
Converter/exhaust isn't clogged up?
Valve lash adjusted properly?

mikey bottles · 11-20-2009, 09:25 PM

valves are definitely good, no sure about the exhaust, but def something to look into! plugs gapped at .44 or .044.. whichever it is.. def good gap though. ill clean the IACV and see how it goes.

mikey bottles · 11-27-2009, 09:10 PM

sorry i havnt gotten back! been a hectic few weeks, just finished moving.. anyway, looks like the fuel pump, so in it goes tomorrow after work!

11-20-2009, 07:01 PM	#1
mikey bottles Prof. Bottles Join Date: Nov 2006 Location: Dirty Jer-Z Age: 24 Posts: 322 iTrader: 1 / 100% Ride: Swapped 88' Rex Rep Power: 15	Engine running rough.. need help! working with an 89 Civic DX 1.5 (obviously) has new dizzy, plugs, wires, and fuel filter, injectors and O2 sensor, timing is dead on, no CEL. If its in park or neutral it idles with a slight miss, but if you put it in reverse or drive it starts missing real bad at a stop... once you begin to accelerate it misses a little, catches up and runs great once you get driving.. the only thing i can think of thats left would be the fuel pump, head gasket, or possibly ecu? i doubt the head gasket bc its not smoking, its not chewing up coolant, and the oil is very clean, no mixture. should i just fire a fuel pump in there and hope for the best or does someone here have a more definitive way of finding the actual problem? at this point ANY thoughts or suggestions are welcome! __________________ *"LAYIN' IT DOWN ON THE STOMPIN' GROUND SINCE 1985" NJ856!*

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11-20-2009, 07:14 PM	#2
phyregod !!YTINASNI Join Date: Jun 2005 Location: Central Texas Age: 30 Posts: 8,914 iTrader: 0 / 0% Ride: '06 Element , '07 CBR 1000rr, '91 CRX, '98 jeep GC 4x4 Blog Entries: 2 Rep Power: 443	My first guess would be a clogged up / faulty IACV. Take it off and clean it up. DIY cleaning your IACV - Honda Forum / Acura Forum - SuperHonda.com Being that it idles fairly well, but boggs under load could indicate low compression.. Compression test the motor and post up the numbers. Are the plugs gapped correctly? Converter/exhaust isn't clogged up? Valve lash adjusted properly?

11-20-2009, 09:25 PM	#3
mikey bottles Prof. Bottles Join Date: Nov 2006 Location: Dirty Jer-Z Age: 24 Posts: 322 iTrader: 1 / 100% Ride: Swapped 88' Rex Rep Power: 15	valves are definitely good, no sure about the exhaust, but def something to look into! plugs gapped at .44 or .044.. whichever it is.. def good gap though. ill clean the IACV and see how it goes.

11-27-2009, 09:10 PM	#4
mikey bottles Prof. Bottles Join Date: Nov 2006 Location: Dirty Jer-Z Age: 24 Posts: 322 iTrader: 1 / 100% Ride: Swapped 88' Rex Rep Power: 15	sorry i havnt gotten back! been a hectic few weeks, just finished moving.. anyway, looks like the fuel pump, so in it goes tomorrow after work!

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Engine running rough.. need help!