 Popping on decel |
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| markb |
 Aug 3 2004, 07:58 PM
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914less :(  Group: Members Posts: 5,449 Joined: 22-January 03 From: Nipomo, CA Member No.: 180 Region Association: Central California 
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As the title says, my stock 72 1.7 is popping a lot on deceleration. I thought it was an exhaust leak, but everything is tight. I thought it could be the stocker muffler wearing out, so I swapped it out for a fairly new Bursch that came on the new to me 71. Still pops, but now it's a louder, meaner sounding pop instead of the wimpy pops from the stock muffler. Any ideas on what's causing it? Injection misadjusted? Timing? Help me, please, it's driving me nuts! Not that it was much of a drive.... (IMG:style_emoticons/default/wacko.gif)
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| Brad Roberts |
Aug 3 2004, 11:11 PM
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Martin hit on it... but he was probably masking a leaking fuel injector. One drop of fuel from an injector that isnt supposed to be firing and it will pop "right now".
Pull the injectors and coil wire off (pos. lead from coil not the coil wire) and spin the engine over and let them fire into a container of some sort so you can watch the pattern of the injectors while they are firing. Do this on both sides.. watch for a nice cone pattern AND watch to see if they dribble after firing. B |
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Posts in this topic
markb Popping on decel Aug 3 2004, 07:58 PM
Ctrout I'll be watching this thread as mine does the ... Aug 3 2004, 08:38 PM Martin Baker My 74 2.0 had this problem on decel as well, with ... Aug 3 2004, 11:06 PM Bruce Allert I was led to believe the knob on the ECU was stric... Aug 3 2004, 11:47 PM Martin Baker I think this applies because during decel the thro... Aug 3 2004, 11:51 PM michelko @Bruce:
Hi,
adjust the idle speed only at the thr... Aug 4 2004, 05:39 AM markb So the fix here is to set the ECU at center, and a... Aug 4 2004, 11:10 PM Brad Roberts That will work. The *proper* thing to do is get th... Aug 4 2004, 11:12 PM markb Thanks, Brad. Once I decide to spend some more tim... Aug 4 2004, 11:15 PM Nemo914 This thread is exactly what I needed! I have ... Aug 5 2004, 08:05 AM
markb I set the ECU at center (22 clicks from one end to... Aug 5 2004, 05:06 PM |
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