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1998 Mpi Running Issues After Restoration


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#31 pete l

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Posted 01 October 2020 - 08:29 AM

That sounds more like a slight misfire. Have you done a compression test on the cylinders ?



#32 leepol83

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Posted 01 October 2020 - 08:36 AM

It comes with all the leads needed to connect to loads of different brands of cars. even the MPI

Brilliant defo worth an investment I reckon πŸ‘πŸ»

#33 leepol83

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Posted 01 October 2020 - 08:40 AM

That sounds more like a slight misfire. Have you done a compression test on the cylinders ?

I haven’t actually might be worth a try πŸ€·β€β™‚οΈπŸ‘ŒπŸ» I’ll put on my list of things to try although it was fine before I removed it

Edited by leepol83, 01 October 2020 - 08:40 AM.


#34 sonscar

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Posted 01 October 2020 - 09:56 AM

When injected cars first appeared I was told: these suffer from the same engine problems as carburettor cars AND all the new stuff,check the motor health before spending lots of cash.I think most modern garages electronically test the compressions first.Steve..

#35 leepol83

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Posted 01 October 2020 - 05:52 PM

Ye I’ll do a compression test aswell just to check engine health like I said before it was a great runner before it was removed and refitted
Thanks
Any more ideas!!!!! Please πŸ™

#36 leepol83

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Posted 02 October 2020 - 06:47 AM

Hi all to summarise :-

Runs very hot through exhaust (actual temp in car ok)
Popping and misfire noted at exhaust end
Will not stall if inlet covered up (actually runs ok)
If throttle pressed will rev itself up
Fuel cap slight hiss and smell

Things I’ll try tomorrow :-
Disconnect servo pipe and block it off from manifold
Compression test
Check all plugs and leads around inlet manifold
Check IACV (Inlet air control)
Check TPS (throttle position)

Is there anything else I can give a go ?
Thank you.

Ow yes also I’ve put a video on YouTube of it running

Edited by leepol83, 02 October 2020 - 06:49 AM.


#37 RustyAutoCityE

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Posted 02 October 2020 - 07:08 AM

Have a good look for any cracks/breaks in the vacuum lines, and make sure they are seated correctly.

#38 pete l

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Posted 02 October 2020 - 09:53 AM

Check for any broken wires around the bulkhead to plugs going to the inlet manifold area, a known problem.

 

You really should not touch the throttle screw, it has to be set using T4. 

 

Check for air leaks around the inlet manifold.

 

Check you have a spark at each sparkplug. Look at the state of the plugs.



#39 leepol83

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Posted 02 October 2020 - 02:36 PM

Lovely thanks chaps abit more food for thought there
Any more ideas more than welcome
Thank you all for taking the time

#40 leepol83

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Posted 02 October 2020 - 05:01 PM

Sorry few more questions :-
Where are all the vacume Pipes to check ?
What spark plugs should I have in it ?
Could the leaking fuel cap make any difference ?

Cheers all going to play with it tomos only get the Saturdays at the moment so want to try lots of things πŸ‘ŒπŸ»πŸ‘πŸ»πŸ™

Just had a thought I’ve fitted a standard mpi manifold gasket however I have a LCB fitted recently could this be an issue ? Maybe the thickness ?

Edited by leepol83, 02 October 2020 - 06:35 PM.


#41 RustyAutoCityE

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Posted 03 October 2020 - 06:40 AM

I think best thing would be to inspect any and all hoses in the engine bay for signs of wear/damage.

 

Be sure to carry out one check at a time and test after each one, that way if something makes a difference you know what it was!



#42 leepol83

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Posted 03 October 2020 - 07:19 AM

I think best thing would be to inspect any and all hoses in the engine bay for signs of wear/damage.

Be sure to carry out one check at a time and test after each one, that way if something makes a difference you know what it was!

Thank you

#43 leepol83

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Posted 03 October 2020 - 05:26 PM

Ok so had a play today again checking pipes etc
Now I think maybe a leak on the injectors (see video)
Also very strange but if I push the throttle position sensor it goes mad (see video) I’ve replaced this and the old one did the same Its not the wiring I’m pushing it’s the actual sensor itself
The actual manifold Gasket seems ok I think


https://youtu.be/PuYNjvfp1UU

https://youtu.be/yeIs49_vbmY

https://youtu.be/_oWAIKCFJVQ

https://youtu.be/q0gvrJvLYSI

Sorry for my bad camera skill or lack of πŸ₯΄πŸ˜‚πŸ˜‚

Edited by leepol83, 03 October 2020 - 05:27 PM.


#44 leepol83

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Posted 03 October 2020 - 07:34 PM

I’ve just invested in a Sykes Pickavant Acr4 Diagnostic machine, no idea how to use it but seems like a good thing to have in the tool box If you own a mpi mini πŸ‘πŸ»

#45 leepol83

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Posted 04 October 2020 - 08:28 AM

What do you think on the videos ?

Cheers chaps πŸ‘πŸ»

Edited by leepol83, 04 October 2020 - 08:28 AM.





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