Some lambda sensor friendly sealant has been sandwiched either side of the exhaust manifold gasket to cure an air leak. However, this didn't improve the pops and bangs through the exhaust.
With the engine idling, I sprayed some WD40 along the inlet manifold gasket area and the rpms rose briefly. Suggesting an air leak on the inlet manifold, I used some more sealant to cure the leak. Unfortunately, this didn't solve the problem either!
A compression test was carried out on the engine with all cylinders giving a reading close to 200psi.
Using a vaccum balancer on the inlet trumpets, the throttle body on cylinder four was drawing in far too much air and any attempts to adjust made little difference. Looking at this particular TB more closely, the source of the issue finally revealed itself as a bent butterfly.
As shown in the image below, both bolts should be parallel. How it got bent, I've no idea! Fortunately, I had a spare TB and this was swapped over. With the spare fitted, the TB on cylinder four balanced up in line with the other three.
I've also started looking at the polybush and crush tubes to try and eliminate the creaking suspension. So far, I've had the near side front apart and lubed the faces with some red rubber grease. With the car raised and the shock removed, this seems to have cured this particular corner of the car. I'm planning to do the other three corners before the weekend.
Hoping for good weather over the weekend so I can take the car to the Newark Kit Car Show.
A compression test was carried out on the engine with all cylinders giving a reading close to 200psi.
Using a vaccum balancer on the inlet trumpets, the throttle body on cylinder four was drawing in far too much air and any attempts to adjust made little difference. Looking at this particular TB more closely, the source of the issue finally revealed itself as a bent butterfly.
As shown in the image below, both bolts should be parallel. How it got bent, I've no idea! Fortunately, I had a spare TB and this was swapped over. With the spare fitted, the TB on cylinder four balanced up in line with the other three.
I've also started looking at the polybush and crush tubes to try and eliminate the creaking suspension. So far, I've had the near side front apart and lubed the faces with some red rubber grease. With the car raised and the shock removed, this seems to have cured this particular corner of the car. I'm planning to do the other three corners before the weekend.
Hoping for good weather over the weekend so I can take the car to the Newark Kit Car Show.
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