engine flutters and backfires at around 3000 rpm
2006-06-29 06:53:57 · 5 answers · asked by Svensson A 1 in Cars & Transportation ➔ Maintenance & Repairs
Sounds like you have bought autozone parts on a tune up - or you need to do a tune up on it - or you have a valve problem.
Run a compression test on it - you may have a burnt, cracked, or sticking valve. (depends on how many miles you have on it now - motor miles not body miles). you could also have a lifter 'pumping up' (not adjusted right and floating at higher RPM) this could also mean a valve spring that has gone weak -- those are all things that require a rebuild so leave them till last IMO unless it is obviously wrong.
Make sure your timing chain is ok (I think that one has an inspection plate - has been a while)
Next, try the benz house for cap, wires, and points - be SURE and pre-gap them and set the dwell (I think the dwell is around 18 on that one - the house can tell you) -- autozone is fine for the plugs, I suggest you stay with champion. But don't use them for the cap or the points.
Next I would guess fuel delivery system problem. if the problem gets worse with more RPM's (load) - start through the system fuel filters, pumps, pressure regulators. If it has sat for a while flush the system, and flush it very well - those systems were never good at bad fuel and are terrible to get clean again.
Those are some very good motors and run forever, but they do get problems from wear and they are not always easy to track down - you need to start at the basics and work forward from there.
2006-06-29 09:14:55 · answer #1 · answered by theleb63 3 · 0⤊ 0⤋
There are vehicles so old, parts are hard to come by or expensive. Newer cars follow current safety guides for the local city; this is important if it rains, snows, or extreme heat above 80 degrees. Some mechanical engineers will tell you do not drive the car above 90 degrees of heat or 100 degrees weather Or below 55 degrees.
2006-06-29 07:03:29 · answer #2 · answered by Neil 3 · 0⤊ 0⤋
It isn't the gas filter out, on account that it runs nice after it begins. It is enormously not likely that it's the gas pump for the equal motive. Try an scan: don't pump the gasoline pedal in any respect, flip the ignition to on, however to not begin, wait two mins, then cross to the begin role - preserve your foot off the gasoline pedal. why are you pumping the gasoline? Generally gas injected vehicles don't like that. Is the laptop striking out any codes? Are you definite that this is a 300S - that's no longer a mannequin Mercedes provided in 1991, possibly a 300E ?
2016-08-30 06:55:54 · answer #3 · answered by golden 4 · 0⤊ 0⤋
If it backfires it is most likely a timing problem, since it is a 1964 I suspect it needs a new timing chain/gear, this should be done by a mechanic that has the proper instruments to calibrate the proper TDC/advance for maximum performance/efficiency
2006-07-05 17:40:45 · answer #4 · answered by teasinglittlebrat 3 · 0⤊ 0⤋
trade it in for a real car, 1987 Chrysler LeBaron. You will save money, and you will look real cool too!
2006-06-29 06:57:50 · answer #5 · answered by default 3 · 0⤊ 0⤋