You'll always smell gas on any part of the intake. I doubt that this is part of the problem but it's only about $40 to try a new one. Easy enough to replace on this car, though the fittings will be quite stiff.

I assume you've also changed the coil wire as part of the set. Sometimes it's overlooked.

I'd change out the intake gasket and the fuel injector seals. Both cheap, relatively simple jobs. Both cause vacuum leaks that would be a problem like this. Good luck!
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Rob Bareiss, New London CT ::: '87 244DL/M47- 234K, '82 245T/M46-182K, '84 242DL/AW70-100K, '89 244DL/AW70- 212K and I miss my: 86 244DL 215K, 87 244DL 239K, 88 744GLE 233K, 88 244GL 147K, 91 244 183K