Eunos 1.6 MPG issues

[viragmakwana]

Just got my 1.6 running and on the road, bought the car 3 months ago and has been off the road for 12 years. I took it for its first run, definitely put my foot down a few times but im getting around 18mpg. Should that be correct if im hammering it, ive read it should be more in the high 20s. Anyone have a couple suggestions on what to check/ test to see if theres anything which will improve this figure. Cheers

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[93_Clubman]

Just got my 1.6 running ... has been off the road for 12 years.

After 12 years off the road the following would be applicable:

A baseline service for an NA8 as applicable would involve:
check/ replace engine oil, oil filter, & sump plug crush washer (every 6 months)
check/ replace gearbox oil, including turret (every 2 years)
check/ replace differential oil 75W-90 (every 2 years)
check/ flush/ replace brake fluid (every 2 years)
check/ flush/ replace clutch fluid (every 2 years)
check/ flush/ replace coolant in radiator & expansion tank (every 2 years)
clean/ replace air filter (every year)
replace fuel filter (every 2.5 years/50k kms)
check/ clean/ replace 4 spark plugs NGK BKR5E-11 (every year) gap=1.1mm
check/ replace spark plug leads
check & clear ECU codes by disconnecting battery
check/ clean/ adjust idle screw 850RPM +/- 50RPM
check/ adjust timing - 10 degrees BTDC
check/ replace CAS O-ring
check rear crankshaft seal drain hole
check/ adjust throttle cable free play 1-3mm
check/ clean throttle body & fuel injectors
check/ clean MAF element
check/ clean PCV valve
check/ clean restrictor operation
check throttle position sensor
check/ replace O2 sensor
check evaporative system
check/ clean cold start pipe fitting & connections
check fuel lines & hoses
check/ adjust/ replace alternator belt 4PK885 - new / used belt: 8-9mm / 9-10mm deflection with moderate pressure
check/ adjust handbrake
check/ adjust clutch pedal free play
check/ adjust brake pedal free play
check/ adjust front & rear wheel alignment
check/ adjust wheel balance
check/ adjust wheel nut tightness
check/ fill washer bottle level
check/ adjust/ replace tyres & pressures
check/ replace wiper inserts (annually just prior to Winter)
check/ replace front & rear brake pads, grease caliper slider pins & machine discs as necessary
check/ replace timing belt (every 100k kms)
check/ replace water pump (best replaced in conjunction with timing belt & front crankshaft & cam seals)
check/ clean power window switch contacts
check/ tighten hardtop latches securing screws
check/ clean inside front lower quarter panels
check/ clean windscreen cowl drains & ventilation intake
check/ clean soft-top drains & drain pipes, as well as sill drains & front windscreen frame rubber side drains
check/ clean battery terminals & under battery tray for rust
check/ clean under body
check/ clean boot, especially boot floor & arms for water or rust
check/ clean engine bay
check/ clean interior, especially parcel shelf & floor pan for water or rust
check/ clean/ polish exterior
check cooling system (including all coolant hoses, ie main hoses, heater hoses & all small hoses between front of motor, throttle body, inlet manifold, oil filter & back of head. Replace as a set if more than one or two seem soft, bulging, oil-soaked, slimy or cracked)
check/ replace inner & outer gearshift boots & gearshift base collar/ cap
check brake lines, hoses & connections
check clutch line, hose & connections, including slave cylinder
check/ adjust/ replace front wheel bearing free play
check engine mounts
check steering operation & gear housing
check steering linkages, rack guide & tie rod ends
check front & rear suspension ball joints
check/ tighten bolts & nuts on chassis & body
check/ replace driveshaft dust boots
check tighten exhaust system heat shields
check/ tighten exhaust manifold bolts & nuts
check/ replace damper dust boots
check/ replace fuel pump wiring harness top tank connection
When present:
check/ adjust/ replace AC & PS belt - new/used AC belt 8-9mm / 9-10mm deflection with moderate pressure
check/ adjust/ replace power steering fluid & lines
check adjust/ replace automatic transmission fluid
If replacing:
clutch then also replace rear crankshaft seal (clutch kit should contain clutch pressure plate, clutch plate, thrust/throw out bearing, spigot/pilot bearing & clutch alignment tool)

[viragmakwana]

Just got my 1.6 running ... has been off the road for 12 years.

After 12 years off the road the following would be applicable:

A baseline service for an NA8 as applicable would involve:
check/ replace engine oil, oil filter, & sump plug crush washer (every 6 months)
check/ replace gearbox oil, including turret (every 2 years)
check/ replace differential oil 75W-90 (every 2 years)
check/ flush/ replace brake fluid (every 2 years)
check/ flush/ replace clutch fluid (every 2 years)
check/ flush/ replace coolant in radiator & expansion tank (every 2 years)
clean/ replace air filter (every year)
replace fuel filter (every 2.5 years/50k kms)
check/ clean/ replace 4 spark plugs NGK BKR5E-11 (every year) gap=1.1mm
check/ replace spark plug leads
check & clear ECU codes by disconnecting battery
check/ clean/ adjust idle screw 850RPM +/- 50RPM
check/ adjust timing - 10 degrees BTDC
check/ replace CAS O-ring
check rear crankshaft seal drain hole
check/ adjust throttle cable free play 1-3mm
check/ clean throttle body & fuel injectors
check/ clean MAF element
check/ clean PCV valve
check/ clean restrictor operation
check throttle position sensor
check/ replace O2 sensor
check evaporative system
check/ clean cold start pipe fitting & connections
check fuel lines & hoses
check/ adjust/ replace alternator belt 4PK885 - new / used belt: 8-9mm / 9-10mm deflection with moderate pressure
check/ adjust handbrake
check/ adjust clutch pedal free play
check/ adjust brake pedal free play
check/ adjust front & rear wheel alignment
check/ adjust wheel balance
check/ adjust wheel nut tightness
check/ fill washer bottle level
check/ adjust/ replace tyres & pressures
check/ replace wiper inserts (annually just prior to Winter)
check/ replace front & rear brake pads, grease caliper slider pins & machine discs as necessary
check/ replace timing belt (every 100k kms)
check/ replace water pump (best replaced in conjunction with timing belt & front crankshaft & cam seals)
check/ clean power window switch contacts
check/ tighten hardtop latches securing screws
check/ clean inside front lower quarter panels
check/ clean windscreen cowl drains & ventilation intake
check/ clean soft-top drains & drain pipes, as well as sill drains & front windscreen frame rubber side drains
check/ clean battery terminals & under battery tray for rust
check/ clean under body
check/ clean boot, especially boot floor & arms for water or rust
check/ clean engine bay
check/ clean interior, especially parcel shelf & floor pan for water or rust
check/ clean/ polish exterior
check cooling system (including all coolant hoses, ie main hoses, heater hoses & all small hoses between front of motor, throttle body, inlet manifold, oil filter & back of head. Replace as a set if more than one or two seem soft, bulging, oil-soaked, slimy or cracked)
check/ replace inner & outer gearshift boots & gearshift base collar/ cap
check brake lines, hoses & connections
check clutch line, hose & connections, including slave cylinder
check/ adjust/ replace front wheel bearing free play
check engine mounts
check steering operation & gear housing
check steering linkages, rack guide & tie rod ends
check front & rear suspension ball joints
check/ tighten bolts & nuts on chassis & body
check/ replace driveshaft dust boots
check tighten exhaust system heat shields
check/ tighten exhaust manifold bolts & nuts
check/ replace damper dust boots
check/ replace fuel pump wiring harness top tank connection
When present:
check/ adjust/ replace AC & PS belt - new/used AC belt 8-9mm / 9-10mm deflection with moderate pressure
check/ adjust/ replace power steering fluid & lines
check adjust/ replace automatic transmission fluid
If replacing:
clutch then also replace rear crankshaft seal (clutch kit should contain clutch pressure plate, clutch plate, thrust/throw out bearing, spigot/pilot bearing & clutch alignment tool)

Cheers for the list, will go through all of this this week

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[lonesailor]

One thing which I recommend you do urgently, is to replace all coolant hoses, they are fairly expensive and some are a PITA to change, but not as expensive or as much a PITA as having to overhaul or replace the engine or at least the cylinder head if one blows at the wrong time or place. Ask me how I know. As far as excessive fuel consumption problems go, I would be checking firstly for fuel leaks, then the injectors, and for oil dilution with fuel due to worn piston rings.. Put a drop or two of oil onto some blotting paper if fuel is present it will show as a lighter colour ring around the spot of oil. Has the car previously been super or turbo charged? if so it might have higher volume injectors installed, check for wet sparkplugs, that would indicate this.

[wyrdeman]

I would also check the O2 sensor (it is in the list posted). I have had them fail and the fuel consumption goes very high. It should throw an error code though. Have you checked for any OBD errors?

Nick

[manga_blue]

I would also check the O2 sensor (it is in the list posted). I have had them fail and the fuel consumption goes very high. It should throw an error code though. Have you checked for any OBD errors?

Nick

Came here to say this, except that they often don't throw an error code

[viragmakwana]

I would also check the O2 sensor (it is in the list posted). I have had them fail and the fuel consumption goes very high. It should throw an error code though. Have you checked for any OBD errors?

Nick

Came here to say this, except that they often don't throw an error code

Would it just be best to replace it anyway just to be sure?

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[bruce]

No OBD on the 1.6
I remember ages ago STM was complaining about poor fuel consumption and he found out his air filter was totally plugged with leaves.

[StanTheMan]

No OBD on the 1.6
I remember ages ago STM was complaining about poor fuel consumption and he found out his air filter was totally plugged with leaves.

tooo right.

that was like ages ago....about time I checked that air filter again . LOL

[manga_blue]

I would also check the O2 sensor (it is in the list posted). I have had them fail and the fuel consumption goes very high. It should throw an error code though. Have you checked for any OBD errors?

Nick

Came here to say this, except that they often don't throw an error code

Would it just be best to replace it anyway just to be sure?

Sent from my SM-G973F using Tapatalk

Yh, the working life of the single wire oxy sensor in the NA6 was meant to be 60,000kms

[manga_blue]

No OBD on the 1.6.

The (non-OBD) diagnostic port on the NA6 is meant to throw a code for a faulty O2 sensor. Trouble is that it hardly ever does