hard to start b18ft

POE · Post by **POE** » Mon Jul 08, 2013 8:28 pm

hi ' engine been out a few years 'had a few teething troubles with wiring etc and is very is starting too good from cold but once running for a few minutes starts ok altho after about 3 seconds 'i have new distributor cap 'plugs 'leads rotor and new camshaft oil seal which was leaking into dizzy cap 'i have double checked wiring and everything looks ok 'any ideas would be much appreciated 'kev

POE · Post by **POE** » Mon Jul 08, 2013 8:32 pm

also the wiring for the oil temp sensor had come adrift and rewired it but doesnt register on info centre and neither does the water temp on info too' fuel pump doesnt prime with ignition and has always been like this 'oh dear i think i have my work cut out

sparkysparks · Post by **sparkysparks** » Mon Jul 08, 2013 9:13 pm

Fuel pump on b18ft doesnt prime, it only works when cranking.
Does the car have fresh fuel?

jamesy12345 · Post by **jamesy12345** » Mon Jul 08, 2013 10:33 pm

My 460 has the same engine, starts easily cold but doesn't like to start hot and runs rich I think...worth checking lambda sensor?

sparkysparks · Post by **sparkysparks** » Tue Jul 09, 2013 11:12 am

Do you still have the cold start sensor plugged in on the head under the throttle?

POE · Post by **POE** » Tue Jul 09, 2013 6:06 pm

hi ' yes fresh fuel and cleaner but the cleaner was put in later ' yes connectors all seem fine altho i had a few that had come way but resoldered etc 'when it had started and blip the throttle it also cuts out 'once running for id say 30 secs seems to start but not great ? ' thought the early turbos fuel pump primed on ignition ? no cat so no lambda sensor '89 turbo 'and thanks for all replies

sparkysparks · Post by **sparkysparks** » Tue Jul 09, 2013 9:22 pm

Have you got the fule pipes the right way round?
I know i had this mistake, but it wouldnt run for 3 seconds let alone 30

jamesy12345 · Post by **jamesy12345** » Tue Jul 09, 2013 9:59 pm

aha B18FTM...sorry thought it was with a cat. My 91 has one.

My 93 car has bodged wiring to the sensor Sparky mentions above. Maybe worth checking this is getting back to ECU?? There is a thread on here somewhere I'll take a look

POE · Post by **POE** » Tue Jul 09, 2013 10:06 pm

once its running it runs all day long 'altho a little lumpy 'if i keep it say at 4k revs you can hear it missing ????????

jamesy12345 · Post by **jamesy12345** » Wed Jul 10, 2013 2:23 am

The thread I was talking about...

http://www.freewebs.com/hjkort/480ecus.htm....pin 2 of the ECU is for the coolant sensor...may be easier to check it that way

http://www.volvo-480-europe.org/forum/v ... =3&t=16611....and resistance values.

But maybe not coolant sensor? Rough running.....spark plug gaps, make them smaller for the Richmod! Just guessing

if the coolant temperature is not showing on the info panel then I guess that is a good one to start with.

Looking through old posts on the forum it could be a few other things:

ICV
Distributor cap, leads, plugs (you said you changed them but make sure u don't have any duff ones)
Loose wire/bad connection including earths....easy to write not easy to find
MAF
Air leak (does the turbo gauge take a long time to get to minus 14 psi when it starts up? If so get the Easystart out. Maybe thin black pipes on the inlet manifold...)
Clogged injectors or fuel filter

Good luck fella just work through the list and any more u can think of! Will get there in the end

sparkysparks · Post by **sparkysparks** » Wed Jul 10, 2013 6:56 am

Give it a compression test aswell

jamesy12345 · Post by **jamesy12345** » Wed Jul 10, 2013 7:41 am

Good thought...POE you have some list now! Hope it is something simple

POE · Post by **POE** » Wed Jul 10, 2013 11:28 am

yes i need to make a check list 'hope it doesnt get too long 'its a good job im in no hurry too 'thanks guys and will keep you posted

POE · Post by **POE** » Thu Jul 11, 2013 6:13 pm

well last night i checked the resistance of temp sensor and it was 0 'had car running for approx 10 mins with few revs on and checked again and still 0 'dead ? checking the rest at weekend when i have a free day

jamesy12345 · Post by **jamesy12345** » Thu Jul 11, 2013 9:41 pm

was that at the ECU plug or at the sensor?

POE · Post by **POE** » Thu Jul 11, 2013 9:51 pm

sorry it was at the sensor

jamesy12345 · Post by **jamesy12345** » Thu Jul 11, 2013 11:25 pm

sounds like the sensor has gone then. Hopefully a new one will sort it!

POE · Post by **POE** » Sat Jul 13, 2013 7:21 pm

managed to get a temp sensor from work off a vauxhall to try 'wired it up to volvo and started first time 'will order a new one from ebay 'thanks for all the input 'much appreciated and sure it wont be the end of my problems 'cheers

jamesy12345 · Post by **jamesy12345** » Sun Jul 14, 2013 12:47 am

POE · Post by **POE** » Sun Jul 14, 2013 9:55 am

another question i have is what is the odd shaped sensor that bolts to the inlet manifold on the right hand side? aluminium sensor with two wires coming from it 'another temp sensor? i have done an ohms test and also reads 0 whether hot or cold 'thanks

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hard to start b18ft

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