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1.8 Convertion


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#1 Rick Decard

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Posted 16 September 2020 - 05:24 PM

Evening everyone , i`m new to the forum so please bear with me . Iv`e recently converted a 1.6 auto to a 1.8 manual , i`ve run into a few issues , with the the throttle open fully engine cuts out ??!! Secondly , with the timing set correctly , the tick over is 1400 rpm and i cant bring it down to a manageable level . Has anyone ever made this swap and if they did ,did they have same issues ? Thanks for your time


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#2 Zed.

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Posted 16 September 2020 - 06:28 PM

did you use the 1.8 throttlebody or the 1.6 item?

also, is your mrs called Rachael?


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#3 Rick Decard

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Posted 16 September 2020 - 07:01 PM

1.6 and no she isnt , but thanks for taking the time to reply


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#4 Rick Decard

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Posted 16 September 2020 - 07:06 PM

But it is nice to know some one else has seen the film


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#5 Martin Y

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Posted 16 September 2020 - 07:29 PM

The high revs suggest an air leak.  Is there a rubber cap on the hose barb sticking out the back of cyl.4 runner on the inlet manifold?

 

I just did a search to compare a '92 1.6 Auto's throttle position sensor with the '94 1.8 manual one and they look functionally the same.  Wire colours are a little different but I assume you already went through this.  What ECU and loom are you using?


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#6 Rick Decard

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Posted 16 September 2020 - 08:43 PM

Hi , firstly , thanks for taking the time to post this , i assumed the air leak problem , but after a couple of hrs couldnt find anything . Not sure about the rubber hose on the back of the manifold , will check in the daylight . My other thought was to modify a 1,8 throttle body to take a 1.6 TPS . the ECU is the auto and the loom is the existing one


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#7 dadbif

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Posted 16 September 2020 - 09:44 PM

How did you check for air leaks? Not easy to spot
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#8 Martin Y

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Posted 17 September 2020 - 10:17 AM

Curious.  So it's kept the same ECU, wiring loom and throttle as before, just the engine and manifolds changed, yet now it's cutting out at full throttle. 

 

There's something nagging at the back of my mind that I've read about someone having addressed the same problem but I can't remember...


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#9 dadbif

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Posted 17 September 2020 - 12:47 PM

If you’ve got a blow lamp or similar spray some propane gas around all the joints, you will hear the difference if there is an air leak.
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#10 Rick Decard

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Posted 17 September 2020 - 02:00 PM

spraying brake cleaner around all the joints and listen for a change in engine note


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#11 Rick Decard

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Posted 17 September 2020 - 03:19 PM

please keep checking in the back of your mind as mine appears to be at a loss


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