Grip_Z Posted February 19, 2012 Share Posted February 19, 2012 Fixed some things and got my 280z Turbo conversion running and on the road, My problem now is it misses pretty bad at idle and when holding a steady RPM. The car seems to be fine in boost but out of boost I get the slight feeling of hesitation, but my timing is set right at 20BTDC like the FSM states, plugs are gaped at 32 because I was getting spark blowout. I have a GM Igniter module but have not yet done the swap. Any ideas what else I should check before/after I do the igniter conversion. Quote Link to comment Share on other sites More sharing options...
dexter72 Posted February 19, 2012 Share Posted February 19, 2012 Try disconnecting and reconnecting the ECU. Check for good spark at each cylinder. Check all the injector connections. If a cylinder is the problem, check for no spark, no fuel. Quote Link to comment Share on other sites More sharing options...
Grip_Z Posted February 19, 2012 Author Share Posted February 19, 2012 All cylinders are getting spark and fuel, They are all firing, there is just a miss somewhere. If it makes a difference some of the Fuel Injector Mounting Blocks are cracked from the donor car. I have new ones on order. Quote Link to comment Share on other sites More sharing options...
Six_Shooter Posted February 21, 2012 Share Posted February 21, 2012 Are the battery cables possibly backwards? Quote Link to comment Share on other sites More sharing options...
Grip_Z Posted February 21, 2012 Author Share Posted February 21, 2012 ...... Quote Link to comment Share on other sites More sharing options...
Grip_Z Posted February 23, 2012 Author Share Posted February 23, 2012 I changed over to the GM Hei Ignition module, put on the new Walbro pump, and cleaned the injector pins. It made a difference and cleared up a lot of it but I still have a noticeable miss at idle every once in a while. Quote Link to comment Share on other sites More sharing options...
Grip_Z Posted February 23, 2012 Author Share Posted February 23, 2012 Pulled the plugs and re gaped them. All the plugs are burning good but my #1 was wet when all of the others are dry. Quote Link to comment Share on other sites More sharing options...
78zstyle Posted February 25, 2012 Share Posted February 25, 2012 How many miles on the engine? Do you burn oil? Quote Link to comment Share on other sites More sharing options...
Grip_Z Posted February 25, 2012 Author Share Posted February 25, 2012 52k and burns no oil. Runs a little rich. Pulled the plugs after cruising and all are dry aside from #1. Should also mention I get a puff of black smoke when starting it in the morning, from it being rich. Quote Link to comment Share on other sites More sharing options...
78zstyle Posted February 25, 2012 Share Posted February 25, 2012 52k and burns no oil. Runs a little rich. Pulled the plugs after cruising and all are dry aside from #1. Should also mention I get a puff of black smoke when starting it in the morning, from it being rich. im guessing you are running an afm? search how to adjust the afm and try that out. weird that only one cylinder is wet. Quote Link to comment Share on other sites More sharing options...
Grip_Z Posted February 25, 2012 Author Share Posted February 25, 2012 I was thinking its a leaky injector, which would account for the rich start, and the fact that the plug is wet. Quote Link to comment Share on other sites More sharing options...
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