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Posted

Hi just thought i,d ask to see if anyone else had sufferd the same problem i,m having. Finally got round to firing up my manta 2.0inj today but its got a nasty misfire at low revs seems to go away once it picks up, When accelerating its flat at first and blows back through filter, Ive checked timing, firing order, Even compression which is 160 throughout, found a small split in vacum pipe so blanked that off at plenium but the problems still there, Could this be faulty injectors has the plugs became black when i rechecked them, Any ideas,,, thanks marc :(

Posted

Hi just thought i,d ask to see if anyone else had sufferd the same problem i,m having. Finally got round to firing up my manta 2.0inj today but its got a nasty misfire at low revs seems to go away once it picks up, When accelerating its flat at first and blows back through filter, Ive checked timing, firing order, Even compression which is 160 throughout, found a small split in vacum pipe so blanked that off at plenium but the problems still there, Could this be faulty injectors has the plugs became black when i rechecked them, Any ideas,,, thanks marc :(

Possibly time for a compression test, I've seen these symptoms with a gasket failure between two cylinders.

Cheers

D

Posted

with engine running take off one ht lead at a time and pop back on again that will isolate the missfire, could be dirty fuel if stood around for some time or check dizzy cap, rotor arm for cracks, moisture.

Posted

just a thought but try moving the plenum chamber when at idle , ive known the nuts back off on the studs if they werent tight enough in the first place , makes it idle like a sack o crap then hesitate on acceleration before it starts to pull.

Posted

Thanks for the reply guys, It was doing my nut in yesterday 8 hours and could'nt cure it. so i stripped out the injectors and cleaned them by connecting them to 12volts with some wire a push button switch and blasting them through with the compressor and some clean petrol No3 was only spraying 1 fine jet as the other 3 were spraying 4 fine jets so i back flushed the dodgy injector and finally managed to clear it, Refitted them with new seals and yes it runs perfect, revs like a good un :):):) Good old u tube for the diy injector cleaner :thumbup

Posted

Quick update, Arrived home from work and the bugger refused to start from cold so i gave it a quick shot of easy start and it fired straight up so got to suss that one out now. Does anyone have any ideas what to check, Thanks ,,,,,marc :unsure:

Posted

also check the temp sender for the ECU if this goes duff causes excessive fuel to be injected. :blink:

Posted

try the cold start valve on the back of the plenum

:)

Disconnect cold start injector.

Random suggestion of the week ;)

That;s two people said that now without telling you how to do a proper test of the thermo-time switch so get your manual of choice out and start checking everything in a methodical manner.

Random suggestions without "How to tell" info are impossible to distinguish from low value guesses.

This link may well be helpful

Posted

Thanks for the quick replies , at least i know where to start now, Never worked on injection systems before so its a bit of a learning curve for me. Thanks for the link too Mantadoc it looks like i can use that for help. Probably be the weekend before i get round to sorting it so engine should be cold enough by then, plus It will stop the wife packing her bags if i leave it alone for a few days :lol: Thanks again {marc}:thumbup

Posted

Got home from work early so unbolted the cold start injector and cranked the engine and it didnt spray fuel out so it looks like thats part of the problem :blink: Going to check the coolant temp sender next

Posted

Just thought i would thank you for the help on this one guys, Problem now sorted it was down to coolent temp sender, car now runs like a dream, will post some recent pics at weekend :rolleyes::thumbup

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