Ti starting

Moderators: scimjim, philhoward, Lukeyboy46, erikscimitardemon, Roger Pennington

Dave Eddy
RSSOC Member
Posts: 98
Joined: Tue Jan 29, 2013 5:34 pm
Location: newcastle-upon-tyne
Been thanked: 2 times

Ti starting

Post by Dave Eddy » Tue Jan 29, 2019 12:15 pm

Well Guy's i really need some help with this starting issue with my 1800 Ti, Ive been all over it checking connections, checking ECU codes etc etc, when i try to start it from cold it just cranks and cranks with no inkling of starting , but if i try to catch it on the throttle, SOMETIMES, i manage to get it to fire and start but very lumpy and will stall at any opportunity , once its running and warms up its fine.????? Ive had a mobile auto electrician look it over but to no avail other the renewing the water temp sensor for the ECU, which changed nothing ! HELP !!



User avatar
PeteMac
RSSOC Member
Posts: 214
Joined: Tue Nov 21, 2006 9:24 pm
Location: Dundee
Has thanked: 29 times
Been thanked: 9 times
Contact:

Ti starting

Post by PeteMac » Tue Jan 29, 2019 12:57 pm

Did you (or the auto electrician) test the crank angle sensor? Sounds very similar to my experience - car would sometimes (not very often) decide to start, and would appear to run fine. But after switching off it wouldn't want to start again. (Does yours consistently re-start when hot?)


1987 1800Ti
(previous 1975 SE5a, 1968 GT)

Dave Eddy
RSSOC Member
Posts: 98
Joined: Tue Jan 29, 2013 5:34 pm
Location: newcastle-upon-tyne
Been thanked: 2 times

Ti starting

Post by Dave Eddy » Tue Jan 29, 2019 1:01 pm

yes it seems to start consistently when warm, would it run ok when warm if the crank angle sensor was dodgy ?



User avatar
philhoward
RSSOC Member
Posts: 25033
Joined: Tue Aug 29, 2006 5:41 pm
Location: Staffs, UK
Has thanked: 51 times
Been thanked: 617 times
Contact:

Ti starting

Post by philhoward » Tue Jan 29, 2019 1:20 pm

Unlikely - electronic components generally fail when hot but work again when cold (during their dying phase).

Was the resistance of the temp sensor checked all the way through to the connector (plug) at the ECU itself?


Phil Howard
Scimitarweb Forum Admin
SS1 1600 Rooster Turbo; Sabre Mk1.5, Sabre Mk2
Previous: SE5/5a/SS1 No.1/SS1 Rooster/SS1 1800Ti/SE5a 24 Valve
http://www.ss1turbo.com
Never try and argue with an idiot. They drag you down to their level, then beat you based on experience.

Dave Eddy
RSSOC Member
Posts: 98
Joined: Tue Jan 29, 2013 5:34 pm
Location: newcastle-upon-tyne
Been thanked: 2 times

Ti starting

Post by Dave Eddy » Tue Jan 29, 2019 2:44 pm

yes ,checked thru to ecu



Dave Eddy
RSSOC Member
Posts: 98
Joined: Tue Jan 29, 2013 5:34 pm
Location: newcastle-upon-tyne
Been thanked: 2 times

Ti starting

Post by Dave Eddy » Tue Jan 29, 2019 2:47 pm

does the throttle sensor control the start-up idle, could that be the problem ?



User avatar
scimjim
RSSOC Member
Posts: 37696
Joined: Sun Oct 01, 2006 10:08 pm
Location: Gloucester
Has thanked: 136 times
Been thanked: 966 times

Ti starting

Post by scimjim » Tue Jan 29, 2019 2:55 pm

I don't believe the TPS will prevent starting if it's showing NC? IIRC ECU inputs are explained in the Nissan Manual/Club Ti book?


Jim King

SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

Dave Eddy
RSSOC Member
Posts: 98
Joined: Tue Jan 29, 2013 5:34 pm
Location: newcastle-upon-tyne
Been thanked: 2 times

Ti starting

Post by Dave Eddy » Tue Jan 29, 2019 2:59 pm

yes jim, got the list of codes but the only one its shown is 31, ive been thru the reset procedure ,no different ?



User avatar
PeteMac
RSSOC Member
Posts: 214
Joined: Tue Nov 21, 2006 9:24 pm
Location: Dundee
Has thanked: 29 times
Been thanked: 9 times
Contact:

Ti starting

Post by PeteMac » Tue Jan 29, 2019 4:29 pm

What's the history with the car Dave? Was it running OK but suddenly developed this fault? Has anything else been done recently that might have brought this on?


1987 1800Ti
(previous 1975 SE5a, 1968 GT)

Dave Eddy
RSSOC Member
Posts: 98
Joined: Tue Jan 29, 2013 5:34 pm
Location: newcastle-upon-tyne
Been thanked: 2 times

Ti starting

Post by Dave Eddy » Tue Jan 29, 2019 4:47 pm

history is running ok till broke piston ring, removed engine did all shells and rings , lapped valves, new stem seals etc when put back in also fixed some dodgy connections on injector wires and TPS ,new water temp sender to ECU,dodgy connection to knock sensor fixed, new rotor arm fitted.



User avatar
scimjim
RSSOC Member
Posts: 37696
Joined: Sun Oct 01, 2006 10:08 pm
Location: Gloucester
Has thanked: 136 times
Been thanked: 966 times

Ti starting

Post by scimjim » Tue Jan 29, 2019 4:49 pm

I don’t mean the list of codes, I mean the descriptions of each item in the EFi system with resistance readings, etc.


Jim King

SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

Dave Eddy
RSSOC Member
Posts: 98
Joined: Tue Jan 29, 2013 5:34 pm
Location: newcastle-upon-tyne
Been thanked: 2 times

Ti starting

Post by Dave Eddy » Tue Jan 29, 2019 4:53 pm

sorry Jim, yes ive got those but no proper meter or knowledge to use one , but the auto electrician checked some of those, seemed ok !



User avatar
philhoward
RSSOC Member
Posts: 25033
Joined: Tue Aug 29, 2006 5:41 pm
Location: Staffs, UK
Has thanked: 51 times
Been thanked: 617 times
Contact:

Ti starting

Post by philhoward » Tue Jan 29, 2019 5:01 pm

You can get a suitable meter for less than £20 these days - and plenty of YouTube videos on how to check sensor values and wiring. Despite the seemingly countless number of wires on the ECU, there isn’t a huge amount to check.

If you fancy a go yourself, I can try and find some suitable links?


Phil Howard
Scimitarweb Forum Admin
SS1 1600 Rooster Turbo; Sabre Mk1.5, Sabre Mk2
Previous: SE5/5a/SS1 No.1/SS1 Rooster/SS1 1800Ti/SE5a 24 Valve
http://www.ss1turbo.com
Never try and argue with an idiot. They drag you down to their level, then beat you based on experience.

User avatar
scimjim
RSSOC Member
Posts: 37696
Joined: Sun Oct 01, 2006 10:08 pm
Location: Gloucester
Has thanked: 136 times
Been thanked: 966 times

Ti starting

Post by scimjim » Tue Jan 29, 2019 5:04 pm

Is it showing 31 with Engine off, Engine off and throttle pedal depressed and with engine running?


Jim King

SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

User avatar
scimjim
RSSOC Member
Posts: 37696
Joined: Sun Oct 01, 2006 10:08 pm
Location: Gloucester
Has thanked: 136 times
Been thanked: 966 times

Ti starting

Post by scimjim » Tue Jan 29, 2019 5:46 pm

Difficult to diagnose remotely but here’s some thoughts on each component

Knock sensor retards ignition by 5 deg at 2000+ rpm, so won’t affect starting.
Water temp sensor is a straight line graph of temp/resistance - will affect fuelling, easy to test.
Ignition signal - continuity check in book
Throttle position switch - continuity check in book, it’s just on/off so won’t prevent startup but will affect fuelling.
Air regulator - affects fuelling, continuity check in book as well as visual check for open/closed
EFi relay and wiring and Fuel pressure regulator (running fine when warm may suggest these are okay?)
Power transistor - as above
Cam timing - as above

Prime candidates IMHO
Injectors and wiring - continuity check in book plus you can hear them if you spin the dizzy.
ECU
AFM will affect starting and running - voltage checks in book
Dizzy - optical position sensors.


Jim King

SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

Post Reply

Return to “SS1/SST/Sabre”